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An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:
- a)momentum
- b)force
- c)moment of force
- d)pressure
Correct answer is 'B'. Can you explain this answer?
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An external influence which changes or tends to change the state of re...
The slope of the velocity-time graph determines the acceleration.
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An external influence which changes or tends to change the state of re...
Explanation:
To understand why the answer is option 'B', we need to first understand what acceleration is and how it can be calculated. Acceleration is the rate at which an object changes its velocity. It is a vector quantity, which means it has both magnitude and direction. The formula for acceleration is:
acceleration = change in velocity / time taken
This means that to calculate acceleration, we need to know the change in velocity and the time taken for that change to occur.
How can we determine the acceleration of a moving object?
There are various ways to determine the acceleration of a moving object. Some of them are:
1. Using a speedometer: A speedometer can be used to measure the speed of a moving object at different points in time. By taking the difference between the speeds at two different points in time, we can determine the change in velocity. Dividing this change in velocity by the time taken for it to occur gives us the acceleration.
2. Using a stopwatch and a measured distance: If we know the distance covered by a moving object and the time taken to cover that distance, we can calculate the average speed of the object. By taking the difference between the average speeds at two different points in time, we can determine the change in velocity. Dividing this change in velocity by the time taken for it to occur gives us the acceleration.
3. Using a velocity-time graph: A velocity-time graph shows the change in velocity of a moving object over time. The slope of the graph represents the acceleration of the object. A steeper slope indicates a greater acceleration, while a flatter slope indicates a smaller acceleration.
Therefore, the correct answer to the question is option 'B', which states that the slope of the velocity-time graph can determine the acceleration of a moving object.
To understand why the answer is option 'B', we need to first understand what acceleration is and how it can be calculated. Acceleration is the rate at which an object changes its velocity. It is a vector quantity, which means it has both magnitude and direction. The formula for acceleration is:
acceleration = change in velocity / time taken
This means that to calculate acceleration, we need to know the change in velocity and the time taken for that change to occur.
How can we determine the acceleration of a moving object?
There are various ways to determine the acceleration of a moving object. Some of them are:
1. Using a speedometer: A speedometer can be used to measure the speed of a moving object at different points in time. By taking the difference between the speeds at two different points in time, we can determine the change in velocity. Dividing this change in velocity by the time taken for it to occur gives us the acceleration.
2. Using a stopwatch and a measured distance: If we know the distance covered by a moving object and the time taken to cover that distance, we can calculate the average speed of the object. By taking the difference between the average speeds at two different points in time, we can determine the change in velocity. Dividing this change in velocity by the time taken for it to occur gives us the acceleration.
3. Using a velocity-time graph: A velocity-time graph shows the change in velocity of a moving object over time. The slope of the graph represents the acceleration of the object. A steeper slope indicates a greater acceleration, while a flatter slope indicates a smaller acceleration.
Therefore, the correct answer to the question is option 'B', which states that the slope of the velocity-time graph can determine the acceleration of a moving object.
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An external influence which changes or tends to change the state of re...
Uu already know..Work is said to be done if force is applied on the body and there is any displacement..Here the body tends to change the state of rest or uniform motion or its dimensions. .so there is some work being done...so,there is an external influence behind this work i.e.Force...so,(B)Force is d correct answer..
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An external influence which changes or tends to change the state of rest or uniform motion of body or its dimensions is called:a)momentumb)forcec)moment of forced)pressureCorrect answer is 'B'. Can you explain this answer?
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