GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the rate velocity changes
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a measure of speed
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the distance traveled by an object
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speed in a certain direction
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Detailed explanation-1: -Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.
Detailed explanation-2: -So the velocity can be changed either by changing the speed or by changing the direction of motion (or both). Therefore, it may be possible that the speed is constant, but the velocity is changing because the direction is changing. In this case, acceleration will be non-zero and equal to the rate of change of velocity.
Detailed explanation-3: -Rate of change of velocity is called as acceleration. Unit of acceleration is m/s2.
Detailed explanation-4: -Based on the above expression, there is a direct relationship between the acceleration and the velocity. This means that, when there is an increase in the velocity, ⇀v, then there would be a direct increase in the acceleration.
Detailed explanation-5: -Acceleration is defined as. The rate of change of velocity with respect to time. Acceleration is a vector quantity as it has both magnitude and direction. It is also the second derivative of position with respect to time or it is the first derivative of velocity with respect to time.