Chapter 4 Test

Work is defined as the product of force and _____.

• Time

• Mass

• Displacement

• Velocity

What is the SI unit of work?

• Joule (J)

    

• Watt (W)

     

• Newton (N)

     

• Pascal (Pa)

Work is considered positive when:

• The force and displacement are in opposite directions.

• The force and displacement are perpendicular to each other.

• The force and displacement are in the same direction.

• The force and displacement are random.

When no displacement occurs despite applying a force, the work done is:

• Positive

• Negative

• Zero

• Impossible to determine

What is energy?

• The ability to do work

• The force applied to an object

• The speed of an object

• The mass of an object

What is the energy stored in a stretched rubber band called?

• Chemical energy

• Kinetic energy

• Elastic potential energy

• Thermal energy

Which of the following forms of energy is associated with the motion of particles in a substance?

   

• Gravitational potential energy

     

• Kinetic energy

     

• Elastic potential energy

     

• Chemical energy

The total mechanical energy of an object in free fall near the Earth's surface remains _____.

   

• Constant

     

• Increasing

     

• Decreasing

     

• Zero

Power is defined as the rate at which work is done or the rate at which _____ is transferred.

   

• Energy

     

• Momentum

   

•   Force

•  Velocity

Which of the following is equivalent to one watt?

• One joule per second

• One newton per meter

• One joule per meter

• One newton-second