Work and Energy

When Force applied on an object is parallel to the displacement of the object then the work done on an object is ___________________

• Parallel

• Negative

• Positive

• Zero

In which of the following situations do your arms do work on books?

• holding a heavy stack of books while standing
• carrying a heavy stack of books
• dropping a stack of books onto a table
• picking up a pile of books from the floor

If you do 40 joules of work lifting a 10N box, how high is the shelf you move it to.

• 400m
• 40m
• 50m
• 4m

Tags

NGSS.HS-PS3-1

NGSS.HS-PS2-4

Calculate the KE of a runner that has a mass of 80 kg and is running at a velocity of 8 m/s

• 5120 J
• 320 J
• 640 J
• 2560 J

Tags

NGSS.HS-PS3-1

Energy due to motion is ____________ energy. 

• Potential 
• Energy
• Kinetic
• Friction

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

At which point is potential energy greatest?

• W
• X
• Y
• Z

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• Both the potential energy and kinetic energy decrease
• The potential energy decreases while the kinetic energy increases 
• The kinetic energy decreases while the potential energy increases 
• Bothe the potential energy and kinetic energy increase 

Tags

NGSS.HS-PS3-1

Gravitational potential energy depends on the ________ and ________ of the object. 

• Height and mass
• Friction and movement
• Mass and Movement
• Height and Friction 

When you pull back the lever on a pinball machine and then release it to launch the ball up a ramp, which of the following energy transformations occurred? (Select all that apply)

• Kinetic --> Gravitational Potential

• Elastic Potential --> Gravitational Potential

• Kinetic --> Elastic Potential

• Chemical Potential --> Kinetic

• Elastic Potential --> Kinetic

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

NGSS.HS-PS3-3

A force of 80 N is used to pull a 10-kg block at an angle of 60 degrees (shown above) to the right. If the block moves 5 meters to the right, how much work was done on the block.

• 4000 N*m

• 200 N*m

• 2000 N*m

• 346.4 N*m

• 400 N*m

Tags

NGSS.HS-PS2-1