Work, Power, Energy

Which two forces do NO work on the gold block?

• Fa

• Fg

• Ff

• Fn

A 1000N force pulls a car for 300m to the left. What is the work done by the truck?

• -300,000 J

• -150,000 J

• 0 J

• 150,000 J

Tags

NGSS.HS-PS3-1

The moon orbits Earth with a circumference of 2.4 * 10⁹m, a constant speed of about 1,000 m/s, and a gravitational attraction of 2*10²⁰ N. What is the work done on the moon by the Earth?

• 0 J

• 2.4 * 10⁶ J

• 2*10²³ J

• 4.8*10²⁹ J

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

A block slides down a ramp at constant speed of 6 m/s. Which force does a positive value of work?

• Fn

• Fg

• Ff

• Fa

Tags

NGSS.HS-PS2-1

A block slides down a ramp at constant speed of 6 m/s. Which force does a negative value of work?

• Fn

• Fg

• Ff

• Fa

Tags

NGSS.HS-PS2-1

A block slides down a ramp at constant speed of 6 m/s. Which force does NO work?

• Fn

• Fg

• Ff

• Fa

Three blocks are each pushed from rest for 10 meters with forces shown. Which block has the most kinetic energy after 10m of travel?

• A

• B

• C

• not enough information

Tags

NGSS.HS-PS2-1

A force changes over time. During which section does that force do the largest magnitude of work?

• A

• B

• C

• D

Tags

NGSS.HS-PS3-1

A force changes over time. During which section is the system in static equilibrium?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

A force changes over time. During which section is the system in dynamic equilibrium?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1