# Problem 5-108 Force and Kinematics - Part 7 - A

Tiny Tompfind, a man of mass $72\; kg$, jumps (from rest) from a table $92 \;cm$ to the floor below. As he lands, he bends his knees so that he decelerates over a distance of $35 \;cm$.

(a) What is Tiny's speed just as he hits the floor?
(b) As he decelerates, what is the magnitude of the force exerted on him by the floor?

Accumulated Solution

(C)   $v_{y{^2}} = v_{0y{^2}} + 2a_yy= 4.2\; m/s\; \text{ (answer to part (a))}\\ a_y = -25.8 \;m/s^2$

(A)   $\sum F_y = ma_y$

No. What direction has been chosen as $+$?

Try again.