Work, Energy, and Power

What is work?

• the amount of energy 

• the transfer of force over a distance

• rate of work in a given time

• the change in distance in a given time

Tags

NGSS.MS-PS3-5

What is the equation for work?

• W = mass x acceleration

• W = force x distance

• W = force / distance

• W = speed / time

Tags

NGSS.MS-PS3-5

What is the equation for power?

• P = Work/time

• P = Force/time

• P = time/distance

• P = Work * time

What is the unit of measurement for Power?

• Joules

• Newtons

• Watts

• Meters

What is energy?

• Force applied over a distamce

• How much work is done.

• Ability to do work

Tags

NGSS.MS-PS3-5

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

• 15 J

• 45 J

• 0 J

• 5 J

What is the definition for kinetic energy?

• the energy of motion (due to mass and velocity)

• stored energy due to position

• Energy at the top of a hill

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

__________ is the rate at which work is done

• Power

• Energy

• Force

• Time

What type of energy is in this picture?

• Kinetic Energy

• Elastic Potential Energy

• Chemical Potential Energy

• No energy here

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 

• 77 J

• 7.7 J 

• 0.7 J 

• 770 J