4J - Conservation of energy

An elastic collision is one in which

• kinetic energy before the collision equals kinetic energy after the collision

• kinetic energy after the collision is zero

• kinetic energy before the collision is less than kinetic energy after the collision

• kinetic energy before the collision is greater than kinetic energy after the collision

Tags

NGSS.HS-PS3-2

Which material is the most likely to experience a highly inelastic collision?

• A lump of play-doh

• a steel ball on a steel plate

• two billiard balls

• a tennis ball thrown at a wall

Unit of energy

• N

• J

• E

• W

Unit of force

• N

• J

• E

• W

Tags

NGSS.HS-PS2-1

What type of energy does a compressed spring on an airplane flying at an altitude of 1000 ft?

• $PE_{sp}$
  

• $KE$

• $PE_g$

• All of these

Tags

NGSS.MS-PS3-2

When these two freight cars collide and couple, what will be their resultant velocity?

• 1 m/s

• 0.1 m/s

• 10 m/s

• 40,000 m/s

Tags

NGSS.HS-PS2-2

Airbags

• Increase the time of impact on a collision

• Decrease the time of impact on a collision

• Increase the force of impact in a collision

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

An 8 kg object has a momentum of 40 kg*m/s. What is the objects velocity?

• 5 m/s

• 320 m/s

• 4 m/s

• 8 m/s

Tags

NGSS.HS-PS2-2

A spring with spring constant 4 N/m is compressed by 0.25 m. How much energy is stored in the spring?

• 1 J
• 0.25 J
• 0.125 J
• 16 J

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-1

A spring with spring constant 16 N/m is compressed by 0.5 m. How much energy is stored in the spring?

• 1 J

• 0.25 J

• 2 J

• 16 J

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-1