A 11 kg box slides down a long, frictionless incline of angle 30°. It starts from rest at time…

(a) What is the original potential energy of the box relative to the ground?
Answer in J

(b) From Newton's laws, find the distance the box travels in 1 s and its speed at t = 1 s.
Answer in m
Answer in m/s

(c) Find the potential energy and the kinetic energy of the box at t = 1 s.
Answer in J (kinetic energy)
Answer in J (potential energy)

(d) Find the kinetic energy and the speed of the box just as it reaches the bottom of the incline.

Answer in J
Answer in m/s


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