Question

when brakes are appliedto a bus retardation produces is 25cm/s² and the bus takes 20 src to stop. calculate: 1. the initial velocity​

Answer 1

Answer:

Initial Velocity of the bus = $-500m/s^2$

Explanation:

Retardation (a) = $25m/s^2$

Final Velocity (v) = $0m/s^2$

Initial Velocity = u

Time taken by the bus to stop = 20secs

$a = \frac{v-u}{t} \\\\25 = \frac{0-u}{20} \\\\500 = 0-u\\\\u = -500m/s^2$

Therefore, the initial velocity of the bus is $-500m/s^2$