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Questions and Answers
What is the formula for work when the force F is constant and the angle θ between the force and the displacement s is also constant?
What is the formula for work when the force F is constant and the angle θ between the force and the displacement s is also constant?
- $W = |F||s|\cos(\theta)$ (correct)
- $W = |F| - |s| - \theta$
- $W = |F| + |s| + \theta$
- $W = |F||s|\sin(\theta)$
When does a force do negative work?
When does a force do negative work?
- When it is applied to an object
- When it has a component opposite to the direction of the displacement at the point of application of the force (correct)
- When it is not aligned with the direction of motion
- When it has a component in the direction of the displacement at the point of application of the force
What is the SI unit of work?
What is the SI unit of work?
- Joule (J) (correct)
- Coulomb (C)
- Newton (N)
- Watt (W)
What does work transfer from one place to another, or one form to another?
What does work transfer from one place to another, or one form to another?
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What is the work done by the gravitational force on a ball as it falls towards the ground?
What is the work done by the gravitational force on a ball as it falls towards the ground?
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Study Notes
Work and Force
- The formula for work when the force F is constant and the angle θ between the force and displacement s is also constant is not specified, but it is typically W = Fscosθ.
- A force does negative work when the direction of the force and the displacement are in opposite directions.
Units of Work
- The SI unit of work is the joule (J), which is equivalent to a newton-meter (N·m).
Energy Transfer
- Work transfers energy from one place to another or from one form to another.
Work and Gravity
- The work done by the gravitational force on a ball as it falls towards the ground is typically negative, as the force of gravity is in the opposite direction to the displacement of the ball.
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Description
Test your understanding of work in physics with this quiz. Explore the relationship between force, displacement, and energy transfer, and learn how to calculate work in different scenarios.
