Gob Bluth $($m $=80$ kg$)$ falls down the ramp of the Bluth Company stair car $($M $=2000$ kg$)$

which is $5$ meters tall. The car has been left in neutral with the brakes off, so it can roll freely. You

may ignore rolling friction for this problem. What are the velocities of Gob and the stair car when

Gob reaches the bottom of the stairs?

$5\mathrm{.}0$ m

all forces acting on the

block$-$spring system. For each force, indicate the object exerting that force and the type of force.

B$.[5$ pts$]$ For each force you listed in part A$,$ state whether the work done by that force is positive,

negative, or zero as the block moves from P to Q$.$ Explain.

Block moves with

decreasing speed

C$.[5$ pts$]$ As the block moves from point P to point Q$,$ does the kinetic energy of the block$-$spring

system increase, decrease, or stay the same? Explain, and be sure to resolve any inconsistencies.

D$.[5$ pts$]$ As the block moves from point P to point Q$,$ does the total energy of the block$-$spring

system increase, decrease, or remain constant? Explain.