Physics
Grade-7
Easy
Question
A 90kg man raises himself 80cm during a pull-up. Calculate how much work a single pull-up entails.
- 720 Joules
- 72,000 Joules
- 1,125 Joules
- 112,500 Joules
Hint:
720 Joules
The correct answer is: 720 Joules
W = F.s
= 90 x 10 x 80/100
= 720 J
W=Fd
W=90×10×80/100
W=720 J
