Simple Machines Test Review

What is work?

• a. The ability to apply a force
• b. The ability to use energy
• c. Applying a force to move an object
• d. Applying a force to use energy

What factors determine how much work is performed on an object?

• a. The force applied to an object
• b. The distance an object is moved
• c. Both a and b
• d. Neither a or b

Why is energy important to doing work?

• a. Energy is created when work is performed
• b. Energy is used when work is performed
• c. Only objects with energy can perform work
• d. Both b and c

A woman pushes a stroller across a park.

• Example of working being done.
• Not an example of work being done.

A man holds weights on his shoulders.

• Example of working being done.
• Not an example of work being done.

A man lifts books and put them on a shelf.

• Example of working being done.
• Not an example of work being done.

A boy pulls a wagon of toys across his yard

• Example of working being done.
• Not an example of work being done.

A girl pushes on a car stuck in snow.

• Example of working being done.
• Not an example of work being done.

A man pushes on a wall.

• Example of working being done.
• Not an example of work being done.

What is energy?

• A. The ability to do work
• B. The ability to do power
• C. Applying a force to move or change something
• D. Applying work to move an object