Question

Initially, a car travels along a straight road with a speed of 35 m/s. if the brakes are applied and the speed of the car is reduced to 10 m/s in 15 s, determine the constant deceleration of the car.

Answer 1

Initial velocity$(u)$= $35 m/s$

Final Velocity$(v)=$ $10 m/s$

Time taken$(t)=$ $15 s$

Acceleration;

$a=$ $\frac{v-u}{t}$

$a=\frac{10-35}{15}=-1.67$

Therefore the constant deceleration of the car is $-1.67m/s$