# Physics Question ?!?

A 72 kg man jumps from a window 1.7 m
above a sidewalk.
The acceleration of gravity is 9.81 m/s
2
.
a) What is his speed just before his feet
strike the pavement?
Answer in units of m/s.
b) If the man jumps with his knees and ankles
locked, the only cushion for his fall is
approximately 0.41 cm in the pads of his...
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A 72 kg man jumps from a window 1.7 m

above a sidewalk.

The acceleration of gravity is 9.81 m/s

2

.

a) What is his speed just before his feet

strike the pavement?

Answer in units of m/s.

b) If the man jumps with his knees and ankles

locked, the only cushion for his fall is

approximately 0.41 cm in the pads of his feet.

Calculate the magnitude of the average

force exerted on him by the ground in this

situation.

Answer in units of N.

above a sidewalk.

The acceleration of gravity is 9.81 m/s

2

.

a) What is his speed just before his feet

strike the pavement?

Answer in units of m/s.

b) If the man jumps with his knees and ankles

locked, the only cushion for his fall is

approximately 0.41 cm in the pads of his feet.

Calculate the magnitude of the average

force exerted on him by the ground in this

situation.

Answer in units of N.

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