Law of Conservation of Mechanical Energy

At which point is potential energy greatest?

• W
• X
• Y
• Z

An object has 64 J of kinetic,134 J of potential, then it will have _____ of mechanical energy.

• 8,576 J
• 189 J 
• 70J
• 198 J 

At which point(s) on the roller coaster is the kinetic energy at its maximum?

• A
• B
• C
• D

At which point(s) on the roller coaster is the gravitational potential energy at its maximum?

• A
• B
• C
• D

Tags

NGSS.HS-PS3-2

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.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

At which point is potential energy greatest?

• W
• X
• Y
• Z

At which point is potential energy greatest?

• W
• X
• Y
• Z

A bead is moving with a speed of 20 m/s at position A on the track shown in the figure. This track is friction-free, and there is no appreciable air resistance. What is the speed of the bead at point C?

• 0 m/s
• 34 m/s
• 69 m/s
• 20 m/s

Tags

NGSS.HS-PS2-4

A toy rocket that weighs 10 N blasts straight up from ground level with an initial kinetic energy of 40 J.  At the exact top of its trajectory, its total mechanical energy is 140 J.  To what vertical height above the ground does it rise, assuming no air resistance?

• 1.0 m
• 10 m
• 14 m
• 24 m

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Which specific type of energy is at point A?

• Potential Energy
• Kinetic Energy
• Mechanical Energy
• None

Tags

NGSS.MS-PS3-2