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?

University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter12: Static Equilibrium And Elasticity
Section: Chapter Questions
Problem 34P: In order to get his car out of the mud, a man ties one end of a rope to the front bumper and the...
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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?
Transcribed Image Text: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?
Transcribed Image Text: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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