15. The figure below shows the acceleration of a 10-kg package that is accelerated to a maximum acceleration of as m 20 (see top of vertical axis). How much work s2 did the force used to accelerate the package do in order to move it from 0 m to 8 m? as 6 8 x ( m) 4) 2. a(m/s²)

15. The figure below shows the acceleration of a 10-kg package that is accelerated to a maximum acceleration of as m 20 (see top of vertical axis). How much work s2 did the force used to accelerate the package do in order to move it from 0 m to 8 m? as 6 8 x ( m) 4) 2. a(m/s²)

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter10: Work, Energy And Machines

Section10.1: Work And Energy

Problem 7PP

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Concept explainers

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.

Question

Number 11 answer should be (a) gravity (b) 15.7 J

You must Answer no. 11, 12, and 15

Thank you in advance. I hope you can answer those questions

Work Done by a Varying Force
15. The figure below shows the acceleration of a 10-kg package that is accelerated to
a maximum acceleration of as
m
20 (see top of vertical axis). How much work
did the force used to accelerate the package do in order to move it from 0 m to 8
s2
m?
as
4
6.
8.
0.
x (m)
a (m/s²)

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
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.
Werk dore by Non-Conservative Fres
118

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