Question

A vehicle moves at a speed of 40 km/h, It is stopped by applying brakes which produces a
uniform acceleration of -0.6m/s2 . How much distance will the vehicle move before coming to
stop?
Q18 Brakes applied to a car produces an acceleration of 5m/s2 in the opposite direction to the
motion. If car takes 1.5s to stop after applying the brakes. Calculate the distance travelled by it?
Q19. A racing car has a uniform acceleration of 4m/s2. What distance will it cover in 10 s after
the start.
Q20.A train is running at the speed of 72km/hr. It crosses a bridge of length half kilometer in 1
minute. Calculate the length of train?

Answer 1

u=40km/hr=11.1m/s
v=0
a= -0.6m/s2

v2 -u2= 2as
(0)2 - (11.1)2 = 2 (-0.6)(s)
-123.21= -1.2s
s = 123.21÷1.2
s = 102.6m