Energy

gravitational potential energy is defined as

• the energy an object has due to its height above the ground
• the energy an object has due to its motion
• the energy a spring has due to its stretch
• the chemical energy stored in the molecules of atoms

the equation for gravitational potential energy is 

• PE_g = mgh
• PE_g= 1/2kx²
• PE_g= Fd
• PE_g = 1/2mv²

What are the two types of Mechanical Energy? (ME)

• Kinetic and Potential Energy
• Kinetic and Nuclear Energy
• Potential and Chemical Energy
• Thermal and Kinetic Energy

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NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-2

Kinetic Energy is defined as

• Energy stored due to its location
• Energy of motion
• Energy stored in the bonds of molecules
• Heat energy

Tags

NGSS.MS-PS3-1

The equation to find kinetic energy is

• KE=1/2mv²
• KE=mgh
• KE=1/2kx²
• KE=Fd

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NGSS.MS-PS3-1

NGSS.MS-PS3-4

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A 70 kg runner has a velocity of 5 m/s. Her kinetic energy is

• 875 J
• 175 J
• 1750 J
• 350 J

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NGSS.MS-PS3-1

Which of the following objects has the most kinetic energy?

• A 20 kg toddler running at 5 m/s
• A 50 kg toddler running at  30 m/s
• A 90 kg toddler running at 30 m/s
• A 100 kg  toddler running at 2 m/s

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?

• Potential Energy
• Kinetic Energy
• Nuclear Energy
• Chemical Energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, how much kinetic energy does it have?

• 10 J
• 100 J
• 7 J
• 20 J

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what is the ball's velocity?

• 6.32 m/s
• 40 m/s
• 4.47 m/s
• 100 m/s