Work, Power, and Gravitational Potential Energy

What is work?

• The mass of an object multiplied by its acceleration
• The force on an object multiplied by the distance it moves
• The rate at which an object moves.
• Labor done by a person or object.

What is the SI unit of work?

• Newton (N)
• meter (m)
• second (s)
• Joule (J)

What is the equation for work?

• W = m g
• W = m a
• W = m v
• W = F d

Define power.

• The force on an object multiplied by the distance it moves
• The rate at which work is done.
• The location of an object on an axis.
• The rate of chage in velocity.

The SI unit of power is the...

• Watt (W)
• Joule (J)
• Newton (N)
• second (s)

The equation for calculating power is …

• P = F d
• P = W t
• P = W/t
• P = m v

What is energy? (pick 2)

• the ability to do work
• the amount of stuff that could happen
• the brightness of an object
• how much stuff is in an object

What is potential energy?

• energy of motion
• energy that cannot be recovered
• energy by friction
• stored energy

Gravitational potential energy is…

• energy of motion
• frictional energy
• the attactive force from earth
• energy that is stored by doing work against gravity

The equation for calculating gravitational PE is

• PE = m g
• PE = F d
• PE = m h
• PE = m g h