A particle moves with a velocity of m/s under the influence of a constant force N. The instantaneous power applied to the particle is:
1. | 200 J/s | 2. | 40 J/s |
3. | 140 J/s | 4. | 170 J/s |
A pump ejects 12,000 kg of water at a speed of 4 m/s in 40 s. The average rate at which the pump is working is:
1. 0.24 kW
2. 2.4 W
3. 2.4 kW
4. 24 W