Question

The mass of a car along with the driver is
1000 kg and it accelerates with 6 m/s2 within the
distance of 500 m. Calculate the work done by the
engine of the car.​

Answer 1

Answer:

7.71*10^4W.

Explanation:

mass of the car,m=1000 kg

Initial velocity of car V1 =0

Initial velocity of V2=100km/h

=100*5/18m

=27.78m/s

Average power of car = change in Kinetic

energy per unit time =(1/2mv2^2-1/2mv1^2)/t

since,V1=0

So,the average power of car=(1/2mv2^2)/t

=(1/2*1000*27.78^2)/5

=7.71*10^4W.

Hence, the work done by engine of the car is 7.71*10^4W.