An impala is an African antelope capable of a remarkablevertical leap. In one recorded leap, a 45 kg impala went into adeep crouch, pushed straight up for 0.21 s, and reached a height of2.5 m above the ground.

To achieve this vertical leap, with what force did the impalapush down on the ground?

Express your answer to two significant figures andinclude the appropriate units.

Fnet =

What is the ratio of this force to the antelope's weight?

Express your answer using two significantfigures.

Fnet / w =