Q4 M5 - CONSERVATION OF MECHANICAL ENERGY

What is the energy of a motorcycle moving slowly at the top of a hill?

• entirely kinetic
• entirely potential
• entirely gravitational
• both kinetic & potential

Tags

NGSS.MS-PS3-2

What kind of energy are you taking in when eating food?

• chemical
• electrical
• sound
• thermal

Tags

NGSS.HS-LS1-7

Which event does NOT describe potential energy being changed into kinetic energy?

• A mango falling from a crate
• A box is sliding down a ramp
• A pen spring being compressed
• A stretched rubber band got loosened

Tags

NGSS.MS-PS3-2

Which event illustrates the direct transformation of potential to kinetic energy?

• A kalesa moves from rest.
• Kathy’s arrow is released from its bow.
• A basketball player catches a flying ball.
• The spring mechanism of a toy is rotated until it locked.

Tags

NGSS.HS-PS3-3

Which sequence of energy transformation best describes what happens when you switch on your battery-run radio?

• chemical energy ➔ electrical energy ➔ sound energy
• mechanical energy ➔ electrical energy ➔ sound energy
• mechanical energy ➔ chemical energy ➔ sound energy
• chemical energy ➔ mechanical energy ➔ sound energy

Tags

NGSS.HS-PS3-3

Which among the forms of energy is considered a potential energy?

• radiant energy
• chemical energy
• sound energy
• thermal energy

Which of the following happens to a coconut that falls freely?

• Gains both potential and kinetic energy.
• Loses both potential and kinetic energy.
• Gains potential energy and loses kinetic energy.
• Loses potential energy and gains kinetic energy.

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

A torchlight fell from the watch tower. The potential energy of the torchlight at the highest point compared to its kinetic energy at the lowest point is __

• equal
• lesser
• greater
• not related

Tags

NGSS.MS-PS3-5

The potential energy of a 1-kg object on top of a hill is 18 J. What is its velocity in m/s just before it hits the bottom of the hill?

• 36 m/s
• 18 m/s
• 6 m/s
• 3 m/s

Tags

NGSS.HS-PS3-1

A bag drops some distance and gains 90 J of kinetic energy. Considering air resistance, how much gravitational potential energy did the bag lose?

• exactly 90 J
• more than 90 J
• less than 90 J
• cannot be determined

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2