11. A 2.0-kg piece of gelatin is made to slide down a ramp from point shown. The total distance between points a andb is 2.0 m while the vertical distance between the same points is 0.80 m. If the ramp is frictionless, (a) what force does work on it and (b) how much work does this force do? U, as

11. A 2.0-kg piece of gelatin is made to slide down a ramp from point shown. The total distance between points a andb is 2.0 m while the vertical distance between the same points is 0.80 m. If the ramp is frictionless, (a) what force does work on it and (b) how much work does this force do? U, as

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 84AP: A cart is pulled a distance D on a flat, horizontal surface by a constant farce F that acts at an...

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Question

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the answer must be

(a) gravity

(b) 15.7 J

Work Done by Conservative Forces
11. A 2.0-kg piece of gelatin is made to slide down a ramp from point a to point b, as
shown. The total distance between points a and b is 2.0 m while the vertical distance
between the same points is 0.80 m. If the ramp is frictionless, (a) what force does
work on it and (b) how much work does this force do?
a
b.
12. One of the fastest pitches in baseball is recorded at 45 m/s. If this pitch were
directed upwards instead of horizontally, to what height would it have travelled?
Ignore the effects of air resistance.

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