Question

A car is moving along a straight line at a speed of 72km/h stops in 5 seconds after the brakes are applied.(a)Find the acceleration (b)plot the graph of speed versus time (c)Using the graph find the distance covered by the car after the brakes are applied.

Answer 1

Answer:

Acceleration =v-u/t

So v=0(because car finally stops)

U=72

T=5

Then accelerate=0-72/5

=-72/5

=14.2m/s^2(deceleration)