**Question 5:** Derive First equation of motion.

**ANSWER**

First equation of motion is derived with the help of the definition of acceleration.

Suppose, a body of mass ‘m’ moving with an initial velocity
v_{i} and it undergoes an acceleration for time‘t’ seconds so that its
final velocity is v_{f}.

Now according to the definition of acceleration,

Acceleration = change in velocity/time

This is first equation of motion.

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