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Homework exercises on work against a resistive force for a Physical Science course. Also refer to Physics, friction, energy, springs, gravity, WBT, education, distance learning, Ron Kurtus, School for Champions  Kurtus Technologies, Copyright © Restrictions

Work - Homework

INSTRUCTIONS: Print out a copy of this homework assignment, answer the questions correctly, and give the homework to your instructor.

YOUR NAME:

Resistive Forces

1. Why are some things more difficult to move than others?

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2. What are some examples of resistive forces?

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3. What is friction?

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4. How do you increase friction?

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5. How do you decrease friction?

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6. When would you want to increase friction?

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7. What is the major cause of air or water resistance?

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8. How do you decrease air resistance?

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9. If you throw a ball up in the air, gravity causes it to slow down. When does its velocity reach zero?

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Work Against a Force

1. What is the definition of work?

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2. How do you measure the work against the force of friction?

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3. What is the work against the resistance of gravity?

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Machines

1. What is a purpose of a machine?

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2. One side of a teeter-totter (lever) is 8 feet long and the other side is 4 feet long. On which side would you sit, with a child on the other side?

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