Physics Energy

The total energy in an isolated system can be increased.

• True
• False

Tags

NGSS.HS-PS3-1

A roller coaster car is poised at the top of the first hill on its track. What type of energy is the car's total energy stored as?

• Kinetic
• Thermal
• Potential
• Mechanical

Tags

NGSS.MS-PS3-2

That same roller coaster car moves down the hill. Assuming that the track is frictionless, which option represents the transfer of energy?

• Potential to Kinetic
• Kinetic to Potential
• Mechanical to Thermal
• Mechanical to Potential

Tags

NGSS.HS-PS3-3

A box with a mass of 20 kg is moving with a velocity of 3 m/s to the right. How much kinetic energy does it have?

• 60 J
• 75 J
• 90 J
• 180 J

Tags

NGSS.HS-PS3-1

A spring with a spring constant of 3 N/m is compressed by 4 cm. How much potential energy is stored in the spring?

• 0.0024 J
• 0.024 J
• 2.4 J
• 24 J

Tags

NGSS.HS-PS3-2

A 1 kg mass is placed against that same spring. When released, the spring imparts all of its energy to the mass. If the surface on which the mass rests is frictionless, what is the speed that the mass will move with?

• 6.9 cm/s
• 7.2 cm/s
• 12.1 cm/s
• 1.3 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS3-1

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

• The PE and KE increase and decrease together
• The PE decreases while the KE increases 
• Impossible to know without knowing the mass  

Tags

NGSS.HS-PS3-2

At which point is potential energy greatest?

• W
• X
• Y
• Z

Tags

NGSS.MS-PS3-2

A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground?

• 2000 Joules
• 19,600 Joules
• 19,600 m/s
• 31.3 m/s

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-1

NGSS.HS-PS3-2

If the Total Mechanical Energy is 50J, Potential Energy is 40 J, what is the Kinetic Energy?

• 1 J
• 10 J
• 90 J

Tags

NGSS.HS-PS3-1