Work and power in physics

What must happen for work to be done on an object?

• The force must be applied in the opposite direction of the object's motion.

• The object must be at rest.

• The object must not move.

• The object must move as the force is applied.

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How is work expressed?

• In newtons

• In watts

• In joules

• In meters

What is the formula for calculating work?

• W = F - D

• W = F * D

• W = F / D

• W = F + D

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What unit is used to express power?

• Newton

• Joule

• Watt

• Meter per second

How can you increase power?

• By increasing the amount of time

• By keeping the amount of work and time constant

• By decreasing the amount of work

• By increasing the amount of work or decreasing the amount of time

What does work transfer from one object to another?

• Mass

• Velocity

• Energy

• Acceleration

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What is required for work to occur?

• A force causes an object to move in the direction of the force.

• A force must be applied in a circular motion.

• A force must be thought about.

• An object must be painted.

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What is power in terms of work done?

• The distance of the work

• The weight of the work

• How fast work is done

• The color of the work

What happens when you apply force but the object doesn't move?

• Work is still done.

• Energy is not transferred.

• No work is done.

• Power is increased.

How is work calculated?

• By multiplying force applied to the object by the object's weight

• By multiplying force applied to the object by the distance the object moves

• By dividing the force applied to the object by the distance

• By adding the force applied to the object and the distance