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Questions and Answers
Which of the following statements about work in physics is correct?
Which of the following statements about work in physics is correct?
- Work is the energy transferred from an object via the application of force perpendicular to a displacement.
- Work is the energy transferred to an object via the application of force along a displacement. (correct)
- Work is the energy transferred from an object via the application of force along a displacement.
- Work is the energy transferred to an object via the application of force perpendicular to a displacement.
When does a force do positive work?
When does a force do positive work?
- When it has a component parallel to the direction of the displacement.
- When it has a component opposite to the direction of the displacement.
- When it has a component perpendicular to the direction of the displacement.
- When it has a component in the direction of the displacement. (correct)
When does a force do negative work?
When does a force do negative work?
- When it has a component opposite to the direction of the displacement. (correct)
- When it has a component perpendicular to the direction of the displacement.
- When it has a component in the direction of the displacement.
- When it has a component parallel to the direction of the displacement.
What is the work done by the gravitational force on a ball as it falls?
What is the work done by the gravitational force on a ball as it falls?
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What is the work done by the gravitational force on a ball when it is thrown upwards?
What is the work done by the gravitational force on a ball when it is thrown upwards?
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