Which of the following is defined as an energy transfer?

• kinetic energy

• work

• potential energy

• chemical energy

Tags

NGSS.MS-PS3-5

The unit of work is

• watt

• hertz

• joule

• pascal

A light plastic cart and a heavy steel cart are both pushed with the same force for a distance of 1.0 m, starting from rest. After the force is removed, the kinetic energy of the light plastic cart is ________ that of the heavy steel cart.

• greater than

• equal to

• less than

• can't say unless we know how big the force is

Tags

NGSS.HS-PS2-1

Each of the boxes shown is pulled for 10 m across a level, frictionless floor by the force given. Which box experiences the greatest change in its kinetic energy?

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

Rank in order, from largest to smallest, the gravitational potential energies of the balls.

• 1 > 2 = 4 > 3

• 1 > 2 > 3 > 4

• 3 > 2 = 4 > 1

• 3 > 2 > 4 > 1

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

Starting from rest, a marble first rolls down a steeper hill, then down a less steep hill of the same height. Ignoring friction, for which is it going faster at the bottom?

• Faster at the bottom of the steeper hill

• Faster at the bottom of the less steep hill

• Same speed at the bottom of both hills

• Can’t say without knowing the mass of the marble

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A small child slides down the four frictionless slides A–D. Rank in order, from largest to smallest, her speeds at the bottom.

• vD > vA > vB > vC

• vD > vA = vB > vC

• vC > vA > vB > vD

• vA = vB = vC = vD

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

NGSS.HS-PS3-1

Four students run up the stairs in the time shown. Which student has the largest power output?

• A

• B

• C

• D

A major league pitcher can throw a baseball with a kinetic energy of 150 J. How much work must the pitcher do to the ball to give it that much KE?

• 150 J

• 0

• Can’t tell without knowing the mass of the ball

Tags

NGSS.HS-PS3-1

In the equation PE = mgh, what does the “g” mean?

• Acceleration due to gravity

• Force of gravity

• Weight of the object

Tags

NGSS.MS-PS3-2