Question

Give the reason for the following,
a) when a bus starts suddenly,the passenger standing in it tend to fall backward.
b) Leaves of a tree may get detached if we vigorusly shake it's branch.
1) Draw a velocity time graph the for uniform motion of a car?
2)A racing car has a uniform acceleration of 4m/s^2.what distance will it cover in 10s after start?

Answer 1

a.) because of inertia of rest

b.) again because of inertia of rest

1.) in above image

2.) a=4m/s2 u=0 t=10sec.

s=1/2*4 (10)^2
s=200 m