Question

A car starts from rest and attains speed of 1km/hr and2km/hr at the end of 1st and 2nd minutes

Answer 1

u=o km/h
v₁=1 km/h
v₂=2km/h
t₁= 1 min= 1/60h
t₂=2min=2×1/60=1/30 h
v₁=u+a₁t₁
1=0+a₁×1/60
a₁=60..........(1)
v₂=u+a₂t₂
2=a₂×1/30
a₂=60.........(2)
equating (1) and (2)
a₁=a₂
thus the car is moving with constant acceleration