Calculate Power

What is power?

• transfer a force through a distance
• the rate of speed 
• the rate of work being done
• transfer of space over time

What is the unit of measurement for Power?

• Joules
• Newtons
• Watts
• Meters

What is needed calculate power?

• work

• time

• mass

• distance

The more POWER you use to move an object, the more work you do. 

• True
• False

W = 500 Joules 
t = 25 seconds
P = ???

• 0.05 W
• 20 W
• 12500 W
• 2000 W

Tags

NGSS.HS-PS3-1

Two workers use 200 J of work (energy) in 2 seconds. How much power is required?

• 100 watts

• 400 watts

• 104 watts

• 50 watts

Tags

NGSS.HS-PS3-1

How much power is used if 350 Joules of work is used to push a box a distance for 5 seconds?

• 70 watts
• 1750 watts

How much power is used if a force of 35 Newtons is used to push a box a distance of 10 meters in 5 seconds? (Hint: Solve for work first. This is a 2-step problem.)

• 70 W

• 3.5 W

• 7 W

• 350 J

Tags

NGSS.HS-PS2-1

A set of pulleys is used to lift a piano weighing 1,000 newtons.  The piano is lifted 3 meters in 60 seconds  How much power is used? (Hint: This is a two step problem.)

• 16.67 watts
• 50 watts

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

What is the difference between calculating power and work?

• Power takes into account the time it takes to complete a task
• Work takes into account the time it takes to complete a task
• Power is force/area
• Work is force/area