Question

To solve this problem we have assumed deceleration to be constant. Then, from the given data, what equation can we use to calculate it?

• A. $a=\frac{v+u}{t}$
• B. $a=\frac{v-u}{t}$
• C. $a=\frac{u-v}{t}$
• D. $a=\frac{t}{v-u}$

Answer 1

The correct option is B $a=\frac{v-u}{t}$

SInce the initial velocity, final velocity and time are given, we can use the first equation of motion, i.e., $v=u+at$,
Therefore,
$a=\frac{v-u}{t}$