Mechanical Energy 1- Work, KE, PE

What are the units for energy?

• Watts

• Joules

• Newtons

• meters

What has to be true about an object for it to have kinetic energy?

• it must be moving

• it must be elevated

• it must be experiencing a net force

• it must be accelerating

Tags

NGSS.MS-PS3-1

What is potential energy?

• the energy an object has due to its position or condition
• the energy an object has due to its motions
• the energy an object has due to its chemical composition
• theh energy an object has due to its atomic structure

Tags

NGSS.MS-PS3-2

What is energy?

• The pivot point allowing a lever to move

• A push or a pull

• Measurement of weight

• The ability to move or allow something to move

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

Tags

NGSS.MS-PS3-2

the equation for gravitational potential energy is 

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

Tags

NGSS.MS-PS3-2

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

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

The equation to find kinetic energy is

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

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

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

• 875 J
• 175 J
• 1750 J
• 350 J

Tags

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