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

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