Work, Energy, and Power Test Review Physics

What are the SI units for work?

• Joules

• Watts

• Newtons

• Meters

What are the SI units for Power?

• Watts

• Joules

• Newtons

• Meters

What are the SI units for Energy (kinetic or potential)?

• Joules

• Watts

• Newtons

• Meters

A man pushes a box up a frictionless ramp until it reaches a dock. A different man lifts a box of the same mass from the ground up onto the same dock. Which man does more work?

• The man lifting the box

• The man pushing the box up the ramp

• Neither-both men are doing the same amount of work

• Unable to determine from the information provided

Two blocks from the same mass are released from the same height "h". One falls straight down, while the other slides down a frictionless ramp. Which one is moving faster as it reaches the bottom?

• Both have the same speed at the bottom

• The block that falls straight down

• The block that slid down the ramp

• Unable to determine from the information provided

Tags

NGSS.HS-PS2-1

A force is pushed perpendicularly onto an object with force "F". If the object is flat on a surface and doesn't move, is there work being done?

• Yes; a force is being applied

• No; a force is being applied but a distance is not being covered

• Yes; a distance is covered with a force

• No; a force is applied

The conservation of energy states:

• The energy of a system is lost

• The energy into a system is equal to the energy out of the system

• The energy is not conserved

• The energy is only conserved in certain situations

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

If the work is doubled on a system and the time remains the same, what happens to the power of the system?

• The power will quadruple

• The power will double

• The power will remain the same

• The power will half

At the top of a roller coaster the car has a potential energy of 8,500 J. As the coaster reaches the bottom of a hill, what is the kinetic energy of the roller coaster car?

• 17,000 J

• 4,250 J

• 8,500 J

• Unable to determine

Tags

NGSS.HS-PS3-2

If we didn't ignore friction in the conservation of energy, what would be the other form of energy besides potential and kinetic energy that would need to taken into consideration?

• Heat

• Electrical

• Elastic

• Mechanical

Tags

NGSS.HS-PS3-4