A 70 kg man leaps vertically into the air from a crouching position. To take the leap the man pushes the ground with a constant force F to raise himself. The center of gravity rises by 0.5 m before he leaps. After the leap the c.g. rises by another 1 m. The maximum power delivered by the muscles is : (Take g=10 ms−2 )
a. 6.26×103 Watts at the start
b. 6.26×103 Watts at take off
c. 6.26×104 Watts at the start
d. 6.26×104 Watts at take off