Work, Power, Energy Test

Which of the following is a true statement about work?

• It measures how quickly an object accelerates 
• It measures how much effort is applied over a certain distance
• It measures the change in an object's rate of speed
• It measures how much time it takes to move a massive object

What does one newton exerted over a distance of one meter equal?

• One watt
• One hertz
• One volt 
• One joule 

Tags

NGSS.HS-PS3-1

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 

Tags

NGSS.HS-PS3-2

You move a 12-newton box up a 6-meter ramp. In order to find out how much power you created, what would you need to know?

• The mass of the box
• The slope of the ramp 
• The direction the box moved
• How long the task took

Tags

NGSS.HS-PS3-1

Which of the following would produce the most power?

• A mass of 10 kilograms lifted 10 meters in 10 seconds 
• A mass of 10 kilograms lifted 10 meters in 5 seconds
• A mass of 5 kilograms lifted 10 meters in 5 seconds
• A mass of 5 kilograms lifted 5 meters in 10 seconds

In order to do work on an object, the force you exert must be...

• The maximum amount of force you are able to exert.
• In the same direction as the object's motion.
• In a direction opposite to Earth's gravitational force.
• quick and deliberate.

What is the correct unit for power?

• Watt

• Joules

• Newtons

• seconds

A set of pulleys is used to lift a piano weighing 1,000 newtons.  The piano lifted 3 meters in 60 seconds  How much power is used?

• 16.67 watts
• 50 watts

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

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

____ is being done when a force is exerted on a wagon while it is being pulled up a hill.

• Power

• Force

• Work

Tags

NGSS.MS-PS3-2