Question

Aa bike is moving with a uniform velocity of 54 km per hour when the raider applies the brakes it comes to rest in 10 second what is the acceleration produced by the brakes

Answer 1

Answer:

Acceleration (a) = $-1.5 ms^{-2}$

Explanation:

Initial Velocity (u) = 54 kmph = $(54 * \frac{5}{18} ) ms^-1$ = $15ms^-1$

Final Velocity (v) = $0 ms^-1$

Time (t) = 10s

∴ $Acceleration = \frac{v-u}{t} = \frac{0-15}{10} = \frac{-15}{10} = -1.5 ms^-2$