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Questions and Answers
What is the equation for work done by a constant force?
What is the equation for work done by a constant force?
- $W = Fd \cos(\theta)$ (correct)
- $W = Fd$
- $W = Fd \sin(\theta)$
- $W = F + d$
When does a force do negative work?
When does a force do negative work?
- When it is applied horizontally
- When it has a component opposite to the direction of the displacement (correct)
- When it has the same direction as the displacement
- When it is applied vertically
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?
- Positive and equal to the weight multiplied by the displacement in the upwards direction
- Zero
- Negative and equal to the weight of the ball
- Negative and equal to the weight multiplied by the displacement in the upwards direction (correct)
What happens to the work done by the gravitational force on a ball as it falls towards the ground?
What happens to the work done by the gravitational force on a ball as it falls towards the ground?
In the work equation $W = Fd \cos(\theta)$, what does $\theta$ represent?
In the work equation $W = Fd \cos(\theta)$, what does $\theta$ represent?
What is the work done by a force when it has a component in the direction of the displacement?
What is the work done by a force when it has a component in the direction of the displacement?
In its simplest form, work for a constant force aligned with the direction of motion equals the product of:
In its simplest form, work for a constant force aligned with the direction of motion equals the product of:
When a force has a component opposite to the direction of the displacement, the work done is:
When a force has a component opposite to the direction of the displacement, the work done is:
If a ball is thrown upwards, the work done by the gravitational force is:
If a ball is thrown upwards, the work done by the gravitational force is:
The work done by the gravitational force on a ball as it falls is equal to:
The work done by the gravitational force on a ball as it falls is equal to:
When does a force do negative work?
When does a force do negative work?
What is the work done by the gravitational force when a ball is held above the ground and then dropped?
What is the work done by the gravitational force when a ball is held above the ground and then dropped?
In the work equation $W = Fd \cos(\theta)$, what does $\theta$ represent?
In the work equation $W = Fd \cos(\theta)$, what does $\theta$ represent?
What happens to the work done by the gravitational force on a ball as it falls towards the ground?
What happens to the work done by the gravitational force on a ball as it falls towards the ground?
For a constant force aligned with the direction of motion, the work equals:
For a constant force aligned with the direction of motion, the work equals:
