The wrecking ball weighing 1,250 kg is lifted to a height of 12.7 m above its resting point. When the wrecking ball is released, it swings towards the old building and creates a deflection of 43.7 cm in the wall. (A) What is the potential energy of the wrecking ball at a height of 12.7 m? (b) What is the value of the kinetic energy when it hits the wall? (c) If the wrecking ball transfers all of its kinetic energy to the wall, what is the value of the force applied to the wrecking ball to the wall? (d) Why does the wrecking ball hit the wall at the lowest point of its swing?

The wrecking ball weighing 1,250 kg is lifted to a height of 12.7 m above its resting point. When the wrecking ball is released, it swings towards the old building and creates a deflection of 43.7 cm in the wall. (A) What is the potential energy of the wrecking ball at a height of 12.7 m? (b) What is the value of the kinetic energy when it hits the wall? (c) If the wrecking ball transfers all of its kinetic energy to the wall, what is the value of the force applied to the wrecking ball to the wall? (d) Why does the wrecking ball hit the wall at the lowest point of its swing?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

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The wrecking ball weighing
1,250 kg is lifted to a height of
12.7 m above its resting point.
When the wrecking ball is
released, it swings towards the
old building and creates a
deflection of 43.7 cm in the
wall. (A) What is the potential
energy of the wrecking ball at
a height of 12.7 m? (b) What is
the value of the kinetic energy
when it hits the wall? (c) If the
wrecking ball transfers all of
its kinetic energy to the wall,
what is the value of the force
applied to the wrecking ball to
the wall? (d) Why does the
wrecking ball hit the wall at the
lowest point of its swing?

Maria suffers from severe
arthritis and can provide a
maximum force of only 25.5 N
when opening the front of her
door. (a) How much more
torque does Maria apply if she
buys a door open lever model
with a handle of 12.7 cm in
length compared to a
conventional knob with a radius
of 3.74 cm? (b) What is the
value of force she needs to
apply to the door handle new to
maintain the original amount of
torque he had with his old
knob?

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