Conservation of Energy

What kind(s) of energy is(are) in a person climbing a ladder?

• Potential
• Kinetic
• Both

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

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  

At which point is potential energy greatest?

• W
• X
• Y
• Z

At which point is potential energy greatest?

• W
• X
• Y
• Z

A change from one form of energy to another is called ___________.

• work
• power
• mechanical
• energy transformations

Tags

NGSS.MS-PS3-5

According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?

• The total amount of energy is conserved
• The total amount of energy is less after a reaction
• The total amount of energy is more after a reaction

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-7

NGSS.HS-PS3-2

NGSS.HS-PS3-4

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-PS2-1

NGSS.HS-PS3-1

A 40 kg crate is picked up by a crane to a height of 50 m. The crate falls. What is the potential energy of the crate?

• 0 J.

• 882 J

• 2000 J

• 19,600 J

Tags

NGSS.MS-PS3-2

When my velocity triples, my kinetic energy increases by ______ times. Remember KE = 1/2 mv²

• 9

• 3

• 1.5

• 4.5

Tags

NGSS.HS-PS3-2

A 40 kg crate is picked up by a crane to a height of 50 m. The crate falls. What is the total mechanical energy of the system? (Remember the crate is at the highest point)

• 0 J

• 882 J

• 2000 J

• 19, 600 J

Tags

NGSS.MS-PS3-2