- when brakes are applied to a bus the retardation produced is 25 cm s and the bus takes 20 s to stop calculate
- the initial velocity of bus
- the distance travelled by bus during this time
Given,
a = 25cm/s2 = 0.25cm/s2
v= 0
t= 20s
u =?
s=?
Using, v = u + at
=> 0 = u + (-0.25)*20
=> u = 5 m/s
Again using, v2 = u2 +2as
=> 02 = 52 +2(-0.25)s
=> 0.5 s = 25
=> s = 50m