A small sports car and a pickup truck start coasting down a 12.1 m hill together, side by side. The mass of th
A small sports car and a pickup truck start coasting down a 12.1 m hill together, side by side. The mass of the sports car is 636 kg and the mass of the pickup truck is 1272 kg (twice the mass of the sports car). Assuming no friction or air resistance, what is the kinetic energy of each vehicle at the bottom of the hill? HINT: How does the kinetic energy of a vehicle at the bottom of the hill compare to the potential energy of the vehicle at the top of the hill? Use your answer to this hint to guide your strategy.
(a) What is the kinetic energy of the sports car?
J
(b) What is the kinetic energy of the pickup truck?
J
What is the speed of each vehicle at the bottom of the hill?
(c) What is the speed of the sports car?
m/s
(d) What is the speed of the pickup truck?
m/s
A. KE = PE = 636*9.81*12.1
B. KE = PE = 1272*9.81*12.1
C. v = (9.81*12.1)^.5
D. v = (9.81*12.1)^.5
