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Questions and Answers
What is the equation for work when a constant force is aligned with the direction of motion?
What is the equation for work when a constant force is aligned with the direction of motion?
- $W = F + d$
- $W = F/d$
- $W = F - d$
- $W = Fd$ (correct)
When does a force do positive work?
When does a force do positive work?
- When it is perpendicular to the displacement
- When it has a component opposite to the displacement
- When it is applied at rest
- When it has a component in the direction of the displacement (correct)
What is the work done by the gravitational force when a ball is thrown upwards?
What is the work done by the gravitational force when a ball is thrown upwards?
- Negative (correct)
- Depends on the mass of the ball
- Zero
- Positive
What happens to work done by a force if it has a component opposite to the displacement?
What happens to work done by a force if it has a component opposite to the displacement?
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What is the work done by the gravitational force when a ball falls to the ground?
What is the work done by the gravitational force when a ball falls to the ground?
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