Question

A bus was moving with a speed of 54 km per hour on on applying brakes it stopped in 8 seconds calculate the acceleration and distance travelled before stopping

Answer 1

u=15 m/s,

v=0 m/s,

by Newton's motion equation,

0=15+a(8)

therefore,

a=-15/8 m/s^2

the negative sign of A indicates the retardation