Work & Power QUIZ

What is work?

• The ability to apply a force.

• The ability to use energy.

• Applying a force to move an object.

• Applying a force to use energy.

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

• The force applied to an object.

• The distance an object is moved.

• Both a & b

• Neither a or b

Why is energy important to doing work?

• Energy is CREATED when work is performed

• Energy is USED when work is performed

• Only objects with energy can perform work

• Both a and b

What is power?

• The rate of doing work

• The rate at which an object moves across a distance

• The acceleration of an object when a force is applied to the object

• The force applied across a distance.

What is the unit of power?

• Newton

• Joule

• Newton per second

• Watts

What is the unit of work?

• Newton

• Joule

• Newton per second

• Watts

What is the relationship between power and energy?

• Power is how much energy is spent to perform work

• Power is the rate of using energy to perform work

• Power is the amount of energy stored in an object

• Power describes how much energy is released when an object performs work.

Two men are placing books on a shelf. 1000 J of work (total for both men) are performed to get the books on the shelf. If it takes them 3 MINUTES to complete the task, how much POWER did they have?

How much work is performed on an object if the object doesn't move?

If John pushes his toy car 2 meters across the floor with a force of 5 Newtons, how much work does he do?