The mass of a car is 1000 kg. How much work is required to be done on it to make it move with a speed of 36 km/h ?
(A) 2.5 × 104 J
(B) 5 × 103 J
(C) 500 J
(D) 5 × 104 J
Correct option: (D) 5 × 104 J
Explanation:
KE = (1/2)mV2
= (1/2) × 1000 × {(36 × 1000) / (3600)}2
= 500 × 100
= 5 × 104J
