Question

If a bus travelling at 20m/s is subject to a steady deceleration of 5m/s², how long will it take to come to rest

Answer 1

Answer:

4 seconds

Explanation:

Initial Velocity = 20 m/s

Final Velocity = 0 m/s (Since bus is coming to rest)

Acceleration = -5 m/s (Since it is decelerating)

Using the first equation of motion, we get:

Equation: v = u + at

Substituting the values,

→ 0 = 20 - 5(t)

→ 5t = 20

→ t = 20/5

→ t = 4 seconds

Hence it would take 4 seconds for the bus to come to rest.