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All questions of Time and Motion for Class 7 Exam
What is the purpose of speed detection cameras?- a)To measure the speed of vehicles
- b)To capture images of vehicles
- c)To detect the number of passengers in a vehicle
- d)To detect the type of vehicle
Correct answer is option 'A'. Can you explain this answer?
What is the purpose of speed detection cameras?
a)
To measure the speed of vehicles
b)
To capture images of vehicles
c)
To detect the number of passengers in a vehicle
d)
To detect the type of vehicle
|
Aditya Shah answered |
To measure the speed of vehicles. Speed detection cameras are used to measure the speed of vehicles and enforce speed limits.
What is average speed?- a)The speed at a particular moment
- b)The total distance traveled divided by the total time taken
- c)The maximum speed attained during a journey
- d)The minimum speed attained during a journey
Correct answer is option 'B'. Can you explain this answer?
What is average speed?
a)
The speed at a particular moment
b)
The total distance traveled divided by the total time taken
c)
The maximum speed attained during a journey
d)
The minimum speed attained during a journey
|
Komal garg answered |
Definition of Average Speed:
Average speed is the total distance traveled divided by the total time taken to cover that distance. It gives an overall idea of how fast an object is moving over a given period of time.
Calculation of Average Speed:
To calculate average speed, you need to divide the total distance covered by the total time taken. For example, if a car travels 100 miles in 2 hours, the average speed would be 100 miles / 2 hours = 50 miles per hour.
Importance of Average Speed:
Knowing the average speed of an object is important because it helps in determining how long it will take to reach a destination. It also provides a general idea of the speed at which the object was moving during the entire journey.
Example:
If a person covers a distance of 200 miles in 4 hours, the average speed would be 200 miles / 4 hours = 50 miles per hour. This means that on average, the person was traveling at a speed of 50 miles per hour.
Conclusion:
In conclusion, average speed is a useful concept in determining the overall speed of an object over a given distance and time. It is calculated by dividing the total distance traveled by the total time taken.
Who was Christiaan Huygens?- a)A scientist who invented the pendulum clock
- b)A scientist who discovered the law of gravitation
- c)A scientist who invented the telescope
- d)A scientist who discovered electricity
Correct answer is option 'A'. Can you explain this answer?
Who was Christiaan Huygens?
a)
A scientist who invented the pendulum clock
b)
A scientist who discovered the law of gravitation
c)
A scientist who invented the telescope
d)
A scientist who discovered electricity
|
Kiran Reddy answered |
A scientist who invented the pendulum clock. Christiaan Huygens is known for his work on timekeeping and invented the pendulum clock in 1656.
What is the average speed of a car that travels 200 km in 4 hours?- a)50 km/h
- b)100 km/h
- c)150 km/h
- d)200 km/h
Correct answer is option 'A'. Can you explain this answer?
What is the average speed of a car that travels 200 km in 4 hours?
a)
50 km/h
b)
100 km/h
c)
150 km/h
d)
200 km/h
|
Rajat Singh answered |
The average speed of a car can be calculated by dividing the total distance traveled by the total time taken to cover that distance.
Given data:
- Distance traveled: 200 km
- Time taken: 4 hours
Calculating the average speed:
- Average speed = Total distance / Total time
- Average speed = 200 km / 4 hours
- Average speed = 50 km/h
Therefore, the average speed of the car that travels 200 km in 4 hours is 50 km/h.
This means that the car was traveling at an average speed of 50 kilometers per hour during the 4-hour journey.
Given data:
- Distance traveled: 200 km
- Time taken: 4 hours
Calculating the average speed:
- Average speed = Total distance / Total time
- Average speed = 200 km / 4 hours
- Average speed = 50 km/h
Therefore, the average speed of the car that travels 200 km in 4 hours is 50 km/h.
This means that the car was traveling at an average speed of 50 kilometers per hour during the 4-hour journey.
What is the formula for calculating speed?- a)Speed = Distance x Time
- b)Speed = Time x Distance
- c)Distance = Speed x Time
- d)Time = Speed x Distance
Correct answer is option 'A'. Can you explain this answer?
What is the formula for calculating speed?
a)
Speed = Distance x Time
b)
Speed = Time x Distance
c)
Distance = Speed x Time
d)
Time = Speed x Distance
|
Madhavan Roy answered |
Formula for Calculating Speed:
The formula for calculating speed is given by the equation:
Speed = Distance / Time
Explanation:
- Speed is a measure of how quickly an object moves. It is defined as the distance traveled per unit of time.
- The formula for calculating speed involves two variables: distance and time.
- Distance is the total length covered by the object in its motion.
- Time is the duration or period in which the object travels.
Formula Derivation:
The formula for speed can be derived from the basic definition of speed, which is the distance traveled divided by the time taken.
Distance = Speed × Time
To isolate speed, we rearrange the equation as follows:
Speed = Distance / Time
This formula shows that speed is calculated by dividing the distance traveled by the time taken.
Example:
Let's say an object travels a distance of 100 meters in a time of 10 seconds. We can use the formula to calculate the speed:
Speed = Distance / Time = 100 meters / 10 seconds = 10 meters per second
So, in this example, the object's speed is 10 meters per second.
Summary:
In summary, the formula for calculating speed is Speed = Distance / Time. This formula enables us to determine how fast an object is moving by dividing the distance traveled by the time taken. It is important to note that speed is a scalar quantity, meaning it only has magnitude (numerical value) and no direction.
The formula for calculating speed is given by the equation:
Speed = Distance / Time
Explanation:
- Speed is a measure of how quickly an object moves. It is defined as the distance traveled per unit of time.
- The formula for calculating speed involves two variables: distance and time.
- Distance is the total length covered by the object in its motion.
- Time is the duration or period in which the object travels.
Formula Derivation:
The formula for speed can be derived from the basic definition of speed, which is the distance traveled divided by the time taken.
Distance = Speed × Time
To isolate speed, we rearrange the equation as follows:
Speed = Distance / Time
This formula shows that speed is calculated by dividing the distance traveled by the time taken.
Example:
Let's say an object travels a distance of 100 meters in a time of 10 seconds. We can use the formula to calculate the speed:
Speed = Distance / Time = 100 meters / 10 seconds = 10 meters per second
So, in this example, the object's speed is 10 meters per second.
Summary:
In summary, the formula for calculating speed is Speed = Distance / Time. This formula enables us to determine how fast an object is moving by dividing the distance traveled by the time taken. It is important to note that speed is a scalar quantity, meaning it only has magnitude (numerical value) and no direction.
What is the difference between distance and displacement?- a)Distance is the total path traveled while displacement is the straight-line distance between the starting and ending points.
- b)Distance and displacement are the same thing.
- c)Distance is the straight-line distance between the starting and ending points while displacement is the total path traveled.
- d)Distance and displacement are both scalar quantities.
Correct answer is option 'A'. Can you explain this answer?
What is the difference between distance and displacement?
a)
Distance is the total path traveled while displacement is the straight-line distance between the starting and ending points.
b)
Distance and displacement are the same thing.
c)
Distance is the straight-line distance between the starting and ending points while displacement is the total path traveled.
d)
Distance and displacement are both scalar quantities.
|
Priyanka Kapoor answered |
Distance refers to the total path traveled, while displacement refers to the change in position from start to end.
What is the difference between speed and velocity?- a)Speed is a scalar quantity while velocity is a vector quantity.
- b)Velocity is a scalar quantity while speed is a vector quantity.
- c)Both speed and velocity are scalar quantities.
- d)Both speed and velocity are vector quantities.
Correct answer is option 'A'. Can you explain this answer?
What is the difference between speed and velocity?
a)
Speed is a scalar quantity while velocity is a vector quantity.
b)
Velocity is a scalar quantity while speed is a vector quantity.
c)
Both speed and velocity are scalar quantities.
d)
Both speed and velocity are vector quantities.
|
|
Priyanka Kapoor answered |
Speed only refers to how fast something is moving, while velocity refers to how fast something is moving in a particular direction.
What is the importance of safe driving?- a)To avoid accidents
- b)To save fuel
- c)To reduce pollution
- d)To reduce traffic congestion
Correct answer is option 'A'. Can you explain this answer?
What is the importance of safe driving?
a)
To avoid accidents
b)
To save fuel
c)
To reduce pollution
d)
To reduce traffic congestion
|
|
Aditya Shah answered |
To avoid accidents. Safe driving is important to avoid accidents and ensure the safety of oneself and others on the road.
What is the formula for calculating time?- a)Time = Distance/Speed
- b)Time = Speed/Distance
- c)Distance = Time x Speed
- d)Speed = Time x Distance
Correct answer is option 'A'. Can you explain this answer?
What is the formula for calculating time?
a)
Time = Distance/Speed
b)
Time = Speed/Distance
c)
Distance = Time x Speed
d)
Speed = Time x Distance
|
|
Priyanka Kapoor answered |
The formula for calculating time is time = distance/speed.
What is the difference between instantaneous speed and average speed?- a)Instantaneous speed is the speed at a particular moment while average speed is the total distance traveled divided by the total time taken.
- b)Instantaneous speed is the speed over a long period of time while average speed is the speed at a particular moment.
- c)Instantaneous speed and average speed are the same thing.
- d)Instantaneous speed is the speed at the start of motion while average speed is the speed at the end of motion.
Correct answer is option 'A'. Can you explain this answer?
What is the difference between instantaneous speed and average speed?
a)
Instantaneous speed is the speed at a particular moment while average speed is the total distance traveled divided by the total time taken.
b)
Instantaneous speed is the speed over a long period of time while average speed is the speed at a particular moment.
c)
Instantaneous speed and average speed are the same thing.
d)
Instantaneous speed is the speed at the start of motion while average speed is the speed at the end of motion.
|
|
Kiran Reddy answered |
Instantaneous speed refers to the speed at a specific moment in time, while average speed is calculated over a period of time.
What is uniform motion?- a)Motion at a constant speed in a straight line
- b)Motion at a variable speed in a straight line
- c)Motion in a circular path
- d)Motion at rest
Correct answer is option 'A'. Can you explain this answer?
What is uniform motion?
a)
Motion at a constant speed in a straight line
b)
Motion at a variable speed in a straight line
c)
Motion in a circular path
d)
Motion at rest
|
|
Priyanka Kapoor answered |
Uniform motion is motion at a constant speed in a straight line.
What is a reference point?- a)A point used to measure distance
- b)A point used to measure time
- c)A point used to measure speed
- d)A point used to measure acceleration
Correct answer is option 'A'. Can you explain this answer?
What is a reference point?
a)
A point used to measure distance
b)
A point used to measure time
c)
A point used to measure speed
d)
A point used to measure acceleration
|
|
Kiran Reddy answered |
A point used to measure distance. A reference point is a point used to measure distance.
What is the formula for calculating distance?- a)Distance = Speed x Time
- b)Distance = Time x Speed
- c)Speed = Distance x Time
- d)Time = Speed x Distance
Correct answer is option 'A'. Can you explain this answer?
What is the formula for calculating distance?
a)
Distance = Speed x Time
b)
Distance = Time x Speed
c)
Speed = Distance x Time
d)
Time = Speed x Distance
|
|
Kiran Reddy answered |
Distance = Speed x Time. The formula for calculating distance is distance = speed x time.
What is the reference point in motion?- a)The object that is moving
- b)The object that is stationary
- c)The starting point of motion
- d)The ending point of motion
Correct answer is option 'B'. Can you explain this answer?
What is the reference point in motion?
a)
The object that is moving
b)
The object that is stationary
c)
The starting point of motion
d)
The ending point of motion
|
|
Priyanka Kapoor answered |
The reference point is the object that is stationary and used to measure the motion of other objects.
What is the numeric value of the speed of light?- a)300,000 km/s
- b)3,000 km/s
- c)30,000 km/s
- d)300 km/s
Correct answer is option 'A'. Can you explain this answer?
What is the numeric value of the speed of light?
a)
300,000 km/s
b)
3,000 km/s
c)
30,000 km/s
d)
300 km/s
|
|
Priyanka Kapoor answered |
The speed of light is approximately 300,000 km/s.
What is the purpose of a speed detection camera?- a)To measure the speed of vehicles and issue fines to drivers who are speeding
- b)To take pictures of vehicles for surveillance purposes
- c)To measure the fuel efficiency of vehicles
- d)To measure the distance between vehicles on the road
Correct answer is option 'A'. Can you explain this answer?
What is the purpose of a speed detection camera?
a)
To measure the speed of vehicles and issue fines to drivers who are speeding
b)
To take pictures of vehicles for surveillance purposes
c)
To measure the fuel efficiency of vehicles
d)
To measure the distance between vehicles on the road
|
|
Priyanka Kapoor answered |
Speed detection cameras are used to enforce speed limits and issue fines to drivers who are speeding.
What is uniform motion?- a)Motion with a constant speed
- b)Motion with a changing speed
- c)Motion with no speed
- d)Motion with no distance
Correct answer is option 'A'. Can you explain this answer?
What is uniform motion?
a)
Motion with a constant speed
b)
Motion with a changing speed
c)
Motion with no speed
d)
Motion with no distance
|
|
Kiran Reddy answered |
Motion with a constant speed. Uniform motion is motion with a constant speed.
What is the periodic motion used to measure time?- a)Oscillation
- b)Rotation
- c)Revolution
- d)Translation
Correct answer is option 'A'. Can you explain this answer?
What is the periodic motion used to measure time?
a)
Oscillation
b)
Rotation
c)
Revolution
d)
Translation
|
|
Priyanka Kapoor answered |
Oscillation. Periodic motion, such as the oscillation of a pendulum, is used to measure time.
What is numeric value?- a)A value that can be expressed as a number
- b)A value that cannot be expressed as a number
- c)A value that is not important
- d)A value that is negative
Correct answer is option 'A'. Can you explain this answer?
What is numeric value?
a)
A value that can be expressed as a number
b)
A value that cannot be expressed as a number
c)
A value that is not important
d)
A value that is negative
|
|
Kiran Reddy answered |
A value that can be expressed as a number. Numeric value is a value that can be expressed as a number.
Chapter doubts & questions for Time and Motion - Class 7 Oxford Science: Chapter Notes, Worksheets & Tests 2025 is part of Class 7 exam preparation. The chapters have been prepared according to the Class 7 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 7 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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