Question

A car salesman says that his best car has a mass of 900 kg and can accelerate from 0 to 27
m/s in 3 seconds
Calculate:
The acceleration of the car in the first 3 seconds,
Im/
Calculate
The acceleration of the car in the first 3 sec

Answer 1

We know Power=timework done------(1)

Also work done= Force× displacement

Now given at time t=8 seconds the maximum velocity that the car attains from rest =24 m/s

So acceleration=tv−u=3 m/s2

Now force= mass×acceleration=1000×3=3000 N

Also from equation of motion we have,

s=ut+21at2

s=96m

Now putting the above found values in equation 1 we get 

Power=83000×96

Average power=36 KW

Answer 2

Answer:

Explanation: v=u+at

It will be 27(v)=0(u)+a[3(t)]

27-0=a(3)

27=a(3)

27/3=a

9=a