Unit 8 - Work and Energy Done

Which of the following physical quantities is a vector?

• Force

• Speed

• Distance

• Time

Which of the following quantities is NOT a component of work done on an object?

• force

• angle of the force

• displacement

• potential energy

Which of the following statements is true about work done on an object involving energy?

• Magnitude of the force should be perpendicular to the displacement.

• Magnitude of the force should be parallel to the displacement.

• If displacement = 0, work is done.

• If the angle of the force is 90 degrees, work is done.

Which of the following defines energy in general?

• Work is the same with energy.

• Energy is only present in objects that are in motion.

• Energy is the ability to do work.

• Energy is created and can be destroyed.

Which of the following physical quantities should be considered in calculating the kinetic energy of an object?

• force

• velocity

• displacement

• height

How is work related to energy?

• Change in potential energy = work

• Change in kinetic energy = net work done

• mechanical energy = work done

• change in mechanical energy = work

Determine the maximum potential energy of the pendulum.

• 28.81 J

• 288.1 J

• 840.35 J

• 84.035 J

Determine the kinetic energy of the pendulum at point A.

• 55.225 J

• 552.25 J

• 840.35 J

• 84.035 J

Fill in the blanks.

Work and energy are related by the principle that energy is neither created nor destroyed. It is only _________ from one form to another.

• transposed

• transferred

• converted

• fabricated

In which of the following conditions is work done?

• 
• 
• 
•