Conceptual Physics: The High School Physics Program
Conceptual Physics: The High School Physics Program
9th Edition
ISBN: 9780133647495
Author: Paul G. Hewitt
Publisher: Prentice Hall
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Chapter 3, Problem 45A
To determine

The position in which the compression is least and the most in the arms of the weightlifters.

Expert Solution & Answer
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Answer to Problem 45A

The position in which the compression is least is B and the position in which the compression is the most is C.

Explanation of Solution

In case of position A, the weightlifter is holding the weight with arms perpendicular to the weight and the ground. Now, the compression is more as it balances the force of weight. In case of position B, the arms are closer to the weight plates that means the weight is distributed evenly to the arms and not on the entire body. Hence, the compression will be lesser in such a case.

In case of position C, the weightlifter is holding much more weight than the position A and B, because in this case the weight of the body is included as well. To be in equilibrium, the weight of the body as well as the weight of the plates is needed to be balanced by the force of weight. Hence, compression is the most in this case.

Hence, the compression is the least in position B and the compression is the most in position C.

Conclusion:

The position in which the compression is least is B and the position in which the compression is the most is C.

Chapter 3 Solutions

Conceptual Physics: The High School Physics Program

Ch. 3 - What is the tendency of a moving object when no...Ch. 3 - What relationship does mass have with inertia?Ch. 3 - What does it mean to say mass and weight are...Ch. 3 - When does an object with twice the mass of another...Ch. 3 - What do you feel when you shake some-thing to and...Ch. 3 - What is the standard (or SI) unit of measurement...Ch. 3 - What is the standard (or SI) unit of measurement...Ch. 3 - What is the weight of a 1-kg brick?Ch. 3 - How fast are you moving relative to Earth when you...Ch. 3 - If you're in a smooth-riding bus that is going at...Ch. 3 - Different materials rest on a table. a. From...Ch. 3 - The three pucks are sliding across ice at the...Ch. 3 - If a woman has a mass of 50 kg, calculate her...Ch. 3 - Calculate in newtons the weight of a 2000-kg...Ch. 3 - Calculate in newtons the weight of a 2.5-kg melon....Ch. 3 - An apple weighs about 1 N. What is its mass in...Ch. 3 - Susie Small finds she weighs 300 N. Calculate her...Ch. 3 - A bowling ball rolling along a lane gradually...Ch. 3 - When a ball rolls down an inclined plane, it gains...Ch. 3 - Jacob gives his skateboard a push and it rolls...Ch. 3 - A space probe can be carried by a rocket into...Ch. 3 - In an orbiting spacecraft, you are handed two...Ch. 3 - Many automobile passengers suffer neck injuries...Ch. 3 - Tim practices a demonstration before doing it for...Ch. 3 - Suppose you place a ball in the middle of a wagon...Ch. 3 - To pull a wagon across a lawn with constant...Ch. 3 - When a junked car is crushed into a compact cube,...Ch. 3 - If an elephant were chasing you, its enormous mass...Ch. 3 - When you compress a sponge, which quantity...Ch. 3 - Which has more mass, a 2-kg fluffy pillow or a...Ch. 3 - Is it more accurate to say that a dieting person...Ch. 3 - A massive ball is suspended on a string and slowly...Ch. 3 - The head of a hammer is loose and you wish to...Ch. 3 - As Earth rotates about its axis, it takes three...Ch. 3 - Prob. 45ACh. 3 - A stone is shown at rest on the ground. a. The...Ch. 3 - Here a stone is suspended at rest by a string. a....Ch. 3 - Here a stone is being accelerated vertically...Ch. 3 - Suppose the string in the figure in Question 48...Ch. 3 - Here is a stone sliding down a friction-free...Ch. 3 - Calculate your own mass in kilograms and your...Ch. 3 - A medium-size American automobile has a weight of...Ch. 3 - What is the weight in newtons of an automobile...Ch. 3 - If a woman weighed 500 N on Earth, what would she...Ch. 3 - Gravitational force on the moon is only 1/6 that...Ch. 3 - Grandparents are interested in the educational...
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