Work, Power and Energy Word Problems

What is the equation for power?

• P = Work/time

• P = Force/time

• P = time/distance

• P = Work * time

Tags

NGSS.MS-PS3-4

What is power?

• transfer a force through a distance

• the rate of speed 

• the rate of work being done

• transfer of space over time

Tags

NGSS.MS-PS3-5

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

If 68 W of power is produced in 18 seconds, how much work is done?

• 1,224 J

• 0.264 J

• 3.77 J

• 12.24 J

Tags

NGSS.MS-PS3-4

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-PS3-4

NGSS.MS-PS3-5

A student needs 10 Newtons of force to lift a box to the top of a 2 meter shelf. How much work do they do?

• 12 J

• 8 J

• 20 J

• 5 J

Tags

NGSS.MS-PS3-5

The ability to do work or cause change:

• work

• energy

• momentum

• power

Tags

NGSS.MS-PS3-5

A worker climbs a ladder and does 8 J of work on a 2 N object. What is the distance they lift the object?

• 18 m

• 4 m

• 10 m

• 6 m

Tags

NGSS.MS-PS3-4