Question

If the mass of a car is 1,500kg then how much amount of work has to be done to increase its speed from 30km/h to 60km/h?​

Answer 1

Answer:

156.25kJ

Explanation:

Work = Change in kinetic energy

= 0.5 m (v² - u²)

= 0.5 × 1500 kg × [(60 × 5/18 m/s)² - (30 × 5/18 m/s)²]

= 156250 joules

= 156.25 kJ

Work done is 156.25 kJ