Question

express the power in kilowatt when the car is moving with 108 km/hr under the action of the force of 200 N

Answer 1

hope u understand the calculations yourself

Answer 2

Answer:

Power of each device, P=500 W=0.5 kW

Time for which the devices are used, t=10 hours

Thus energy consumed by 4 devices, E=4×P×t

E=4×0.500×10 kWh

⟹E=20 kWh