A 2-kg box slides down a long, frictionless incline of angle 30. It starts from rest at
Question:
A 2-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 20 m above the ground.
(a) What is the original potential energy of the box relative to the ground?
(b) From Newton's laws, find the distance the box travels in 1 s and its speed at t = 1 s.
(c) Find the potential energy and the kinetic energy of the box at t = 1 s.
(d) Find the kinetic energy and the speed of the box just as it reaches the bottom of the incline.
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a U i mgh U i 2 981 20 J 392 J b a g sin 30 o ...View the full answer
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Related Book For
Fundamentals of Ethics for Scientists and Engineers
ISBN: 978-0195134889
1st Edition
Authors: Edmund G. Seebauer, Robert L. Barry
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