Question

What is the work done to increase the velocity of a car from 30km/h to 60km/h if the mass of the car is 1500kg?

Answer 1

From work energy theorem work done is equal to change in kinetic energy
= 1/2m(v^2 - u^2)
= 1/2 × 1500( 16.6 - 8.3)
= 6225 joule

Answer 2

Answer:

6225J

Explanation:

according to theorem change in kinetic energy is equal to workdone

K.E=W

1/2m(v^2-u^2)

1/2X 1500 (60*5/18+30*5/18)

750 (16.6-8.3)

6225J