WPE Review

The amount of energy needed to move large object over a specific distance is much smaller than the energy needed to move small object an equivalent distance.

• True

• False

Work is defined in units of

• Joules (J)

• meter (m)

• Newton (N)

Distance is in units of

• meter (m)

• newton (N)

• Joules (J)

It is the ability of an object to perform work.

• Energy

• Force

• Power

Which of the following situations shows that WORK is done on an object?

• 
• 
• 
• 

How much work is done on an object if the amount of force applied is 50 N and the object was displaced by 2 meters from its original position?

• 100 J

• 25 J

• 100 W

• 25 W

Which of these items is not part of the law of conservation of energy?

• energy cannot be created

• energy cannot be destroyed

• energy can be transferred between forms

• energy is destroyed by friction

Where is the kinetic energy of pendulum at its highest?

• at the top of the swing

• at the bottom of the swing

• at 1/4 of the swing

• at 3/4 of the swing

Stored energy in the form of position or condition.

• potential energy

• kinetic energy

• momentum

• mechanical energy

Calculate the Kinetic Energy (KE) of a girl whose mass is 50 kg who is moving at 4 m/s.

• 200 J
• 800 J
• 400 J
• 100 J