Work and Energy

A student turns on flashlight. What is the energy conservation that happen there?

• chemical - light - electrical

• electrical - chemical - light

• chemical - electrical - light

• light - chemical - electrical

Tags

NGSS.HS-PS3-3

NGSS.HS-PS1-4

A person boils water by using electrical stove. What type of energy conservation there?

• heat - electrical

• electrical - heat

• sound - heat

• heat - light

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-4

A box is pushed by 20 N force to the right and displace for 0.1 m. What is the work done?

• 0.005 J

• 0.1 J

• 1 J

• 2 J

Tags

NGSS.MS-PS3-5

What is the formula of work?

• W = F / d

• W = F + d

• W = F x d

• W = F - d

A car has speed 5 m/s and the mass of the car 1000 kg. What is the kinetic energy of the car?

• 12500 J

• 25000 J

• 5000 J

• 2500 J

Tags

NGSS.HS-PS3-1

A box is raised from 2 m to 5 m. This box has mass 15 kg. What is the change in potential energy from initial to final point? (

 $g=10\ \frac{m}{s^2}$  )

• 300 J

• 450 J

• 750 J

• 1000 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Which of the following variable is not affect the potential energy?

• height from ground

• gravitational acceleration

• mass

• temperature

Tags

NGSS.MS-PS3-2

Potential energy of a feather is 2 J. The mass of the feather is 50 gram. What is the height of feather above the ground? (

 $g=10\ \frac{m}{s^2}$  )

• 4 cm

• 40 cm

• 400 cm

• 4 km

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Initially, the box at rest. Then after applied by a force, it moves to 10 m/s. The mass of box is 5 kg. What is the work done of force?

• 25 J

• 250 J

• 500 J

• 750 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS2-1

A marble is thrown upward with initial speed 20 m/s. The mass of marble is 0.01 kg. What is the maximum height reached by marble? (

 $g=10\ \frac{m}{s^2}$  )

• 5 m

• 10 m

• 15 m

• 20 m

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2