Q4 of 14 Page 104

Answer the following

If a body is moving with uniform velocity in a given direction its acceleration will be zero. Why?


The acceleration of a body is the rate of change of velocity. If the velocity is not changed with time, then the acceleration is constant and is equal to zero. So, for a body moving with uniform velocity, the acceleration is zero.

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An object changes its velocity from 30 ms-1 to 40 ms-1 in a time interval of 2s. What is its acceleration?

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An object at rest starts moving. It covers a distance of 2m in one second. It covers a further distance of 5 m in two seconds in the same direction. What is its average velocity and acceleration?

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Answer the following

Distinguish between speed and velocity.

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Answer the following

Distinguish between distance travelled and displacement.