Question

A 10 kg box slides down a long, frictionless incline of angle 30°. It starts from rest at time t = 0 at the top of the incline at a height of 18 m above ground.

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

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

---m

---m/s
(c) Find the potential energy and the kinetic energy of the box at t = 1 s.

---J(kinetic energy)

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

---J

---m/s

Answer 1