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Important Questions Test: Motion & Time - Class 7 MCQ


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10 Questions MCQ Test Science Class 7 - Important Questions Test: Motion & Time

Important Questions Test: Motion & Time for Class 7 2024 is part of Science Class 7 preparation. The Important Questions Test: Motion & Time questions and answers have been prepared according to the Class 7 exam syllabus.The Important Questions Test: Motion & Time MCQs are made for Class 7 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Important Questions Test: Motion & Time below.
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Important Questions Test: Motion & Time - Question 1

The distance-time graph of the non-uniform motion is a _________ line

Detailed Solution for Important Questions Test: Motion & Time - Question 1
  • The distance-time graph of the non-uniform motion is a curved line as it covers unequal distances in equal intervals of time.
Important Questions Test: Motion & Time - Question 2

Which of the following is an example of non-uniform motion?

Detailed Solution for Important Questions Test: Motion & Time - Question 2

Non-uniform motion:

  • Movement of an asteroid: Asteroids move in a non-uniform motion as they travel through space, changing speed and direction due to various gravitational forces acting on them.
  • A car coming to a halt: When a car comes to a halt, it is an example of non-uniform motion as it starts with a certain speed and gradually slows down until it stops completely.
  • A bouncing ball: A bouncing ball also exhibits non-uniform motion as it changes speed and direction each time it bounces off a surface.

Therefore, all of the given examples - movement of an asteroid, a car coming to a halt, and a bouncing ball - are examples of non-uniform motion as they involve changes in speed and direction over time.

 

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Important Questions Test: Motion & Time - Question 3

A scooterist travels at 30 km/h along straight path for 20 min. What is distance?

Detailed Solution for Important Questions Test: Motion & Time - Question 3

If the scooter is travelling at precisely 30km/h in a perfectly straight line.
We know 1 hour=60 minutes
Therefore to calculate the distance traveled in the started fraction of the hour.

Therefore 10km is the distance traveled in 20 minutes of travelling at a speed of 30km/h

Important Questions Test: Motion & Time - Question 4

A car covers a distance of 2 km in 2.5 minutes. If it covers half of the distance with speed 40 km/hr, the rest distance it shall cover with a speed of:

Detailed Solution for Important Questions Test: Motion & Time - Question 4

Given that,
Time t =2.5 min
⁡Distance d=2km

Now, firstly for half distance

Now, total time is
t = 150 - 90
t = 60s
Now, the speed is

Hence, the speed is 60 km/h

Important Questions Test: Motion & Time - Question 5

Rajdhini express moves at a speed of 150 km/h. How long will it take to cover a distance of 15 km?

Detailed Solution for Important Questions Test: Motion & Time - Question 5

Given,
speed v = 150 km/h
distance cover = displacement   d=15 km    (Assume express is not changing its direction)


Time taken t = 0.1 hr

Important Questions Test: Motion & Time - Question 6

Which of the following does not express a time interval?

Detailed Solution for Important Questions Test: Motion & Time - Question 6

Explanation:

  • Time of the first bell in the school: This expresses a specific time point when the bell rings in the school. It does not indicate a duration or interval.
  • A day: This expresses a 24-hour time interval from one midnight to the next.
  • A second: This expresses a very short time interval, equivalent to 1/60th of a minute.
  • A school period: This expresses a specific duration of time during which classes are held in a school.

Therefore, option A: Time of the first bell in the school does not express a time interval as it refers to a specific point in time rather than a duration or period.

 

Important Questions Test: Motion & Time - Question 7

If we denote speed by S distance by D and time by T the relationship these equation is? 

Detailed Solution for Important Questions Test: Motion & Time - Question 7

Important Questions Test: Motion & Time - Question 8

The meter that is used to measure the distance moved by the vehicle is known as _____. Fill in the blank.

Detailed Solution for Important Questions Test: Motion & Time - Question 8

Odometer is an instrument used in the vehicle to measure the distance cover by it.

Important Questions Test: Motion & Time - Question 9

Car travels first 60 km of a distance in 1 hr, next 70 km of the distance in next hour and remaining 20 km distance in final hour. Find its type of motion

Detailed Solution for Important Questions Test: Motion & Time - Question 9


So, the car travels different distances in equal time intervals. This is an example of non-uniform motion.

Important Questions Test: Motion & Time - Question 10

What is the speed of a car that travels 15 km in 20 minutes, expressed in km/h?

Detailed Solution for Important Questions Test: Motion & Time - Question 10

- To find the speed of the car, we start with the distance traveled and the time taken.
- The car travels 15 km in 20 minutes.
- First, we convert time from minutes to hours: 20 minutes = 20/60 hours = 1/3 hours.
- Now, speed is calculated using the formula: Speed = Distance / Time.
- Substituting the values: Speed = 15 km / (1/3 hours) 


- Therefore, the correct answer is 45 km/h, which corresponds to option 3.

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