Chapter 9 Test: Work, and Simple Machines

Is holding a book out in front of you and your arms getting tired considered work?

• Yes, because it requires energy

• No, because there is no displacement

• Yes, because it is a physical activity

• No, because it is not a job

What does it mean to do work in physics?

• Applying a force to an object without moving it.

• Applying a force to move an object in the direction of the force.

• Thinking hard about moving an object but not physically moving it.

• Watching an object move on its own without any external force.

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What is the formula for calculating work?

• Work = Distance / Force

• Work = Force + Distance

• Work = Force x Distance

• Work = Force - Distance

For work to be done, in which direction must the force act?

• Opposite to the direction of the movement

• Perpendicular to the direction of the movement

• In the direction of the movement

• Force direction is irrelevant

When is no work done on an object according to the concept of work in physics?

• When the object is moved over a distance by a force.

• When the object is held in place while a force is applied.

• When the object moves at a constant speed.

• When the object is accelerated by a force.

Is work being done when weight-lifting?

• YES

• NO

• Only when lifting upwards

• Only when holding still

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Is work being done when pushing against a locked door?

• YES

• NO

• Only if the door eventually opens

• Only if you push for a long time

Is work being done when swinging a golf club?

• YES

• NO

• Only during a tournament

• Only if the ball goes far

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Is work being done when hanging from a chin-up bar?

• YES

• NO

• Only if you pull yourself up

• Only if you hang for more than a minute

What is one joule equivalent to?

• One Newton of Force moving 10 meters

• One Newton of Force moving 1 meter

• One Newton of Force moving 100 meters

• Ten Newtons of Force moving 1 meter

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