SAT Physics Preparation MCQ 456 PDF Download

MCQ: In stairs, each step has a height of 0.25 m and there are 8 steps altogether. If a boy runs up the flight of steps in 4 s and his weight is 390 N, what is his body's power?

1. 3900 W
2. 360 W
3. 244 W
4. 979 W