Question

A car starting from rest accelerates uniformly to acquire a speed 10 km/h in 30 min. The distance travelled by the car in this time interval will be ​

Answer 1

Answer:

Here, u=0,v=20km/h,t=30min=0.5h

Putting these values in v=u+at

20=0+a∗0.5

We get, a=40km/h

2

Putting the values in S=ut+

2

1

at

2

S=0∗0.5+

2

1

∗40∗0.5

2

S=5km

Answer 2

Answer:

intial velo (u) = 0

final velo (v) = 10kmph

time = 30min = 0.5 hrs

acceleration = v-u/t

= 10/0.5 = 20kmph

s = ut + 1/2at²

= 0 + 10×0.5×0.5

= 2.5 kms