A 60 kg woman jumps off a 3 m high wall onto the hard ground. Taking g=10 Nkg−1 ,
a. calculate the impulse felt by the woman as she lands on the ground.
b. when the woman lands, her body moves a distance of 1.5 cm. Calculate the average force exerted on the woman's feet and legs by the hard ground.
c. if the woman had bent her legs whilst landing, her body would have moved a distance of 50 cm. Compare the force she would have experienced whilst bending her legs to the force you calculated in part b.
d. Comment on why it is sensible to bend one's legs when landing on the ground from a jump.