(A) : The equations of motion in scalar form can be applied only if acceleration and velocity are along the same line.
(R) : If the acceleration of a body is constant then its motion is known as uniform motion.

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(A) is true but (R) is false

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

Both (A) and (R) are true and (R) is not the correct explanation of (A)

answer is C.

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Detailed Solution

Acceleration changes the velocity along its direction only. So, the equations of motion in scalar form can be applied only if acceleration and velocity are along the same line.

For a uniform motion, velocity must be constant.

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