Energy

Which of the following is the form of energy illustrated by a fan spinning its blades?

• motional

• thermal

• electrical

• mechanical

Which of the following would increase the amount of potential energy on an object?

• increasing its mass

• increasing its distance above the surface

• taking it to a planet with a larger "g"

• all of these

Tags

NGSS.MS-PS3-2

Which of the following would decease the kinetic energy of an object?

• increasing the speed of the object

• increasing the mass of the object

• having the motion of the object cover less distance in a specific amount of time

• none of these

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

NGSS.MS-PS3-4

When solving for the kinetic energy of an object, you should.....

• square the velocity, then multiply by the mass, then divide by 1/2

• square the velocity, then multiply by the mass, then divide by 2

• multiply the mass and velocity, then square the product and divide by 2

• multiply the mass and velocity, then square the product and divide by 1/2

Tags

NGSS.MS-PS3-1

What did you do to the car with the car, marbles and ramp lab to increase its kinetic energy?

• Decrease mass

• Add marbles and bring the ramp down on the physics stand

• Add marbles and increase the distance from the table

• Decrease distance

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which of the following would you predict to use the most power?

• a portable fan

• pencil sharpener

• portable heater with a moving fan

• data collector/timer with both photogate blocked

The SI Unit for power is the ____________, for work is the ___________, for potential energy is the _________, and for kinetic energy is the _________.

• watt, joule, kilowatt, joule

• watt, joule, volt, joule

• joule, watt, joule, joule

• watt, joule, joule, joule

Tags

NGSS.MS-PS3-5

If you have to carry 20 objects of equal mass a distance of 5 meters, which of the following requires the most work?

• 1 trip

• 4 trips with 5 items each

• 5 trips with 4 items each

• the number of trips doesn't matter since you are carrying specific objects a specific distance

Which requires more work?

• carrying 3 objects of a mass of 2 grams in 3 trips of 5 meters each

• carrying 2 objects of a mass of 2 grams 5 meters and then carrying 1 object of a mass of 2 grams 5 meters

• carrying 3 objects of a mass of 2 grams 5 meters in one trip

• none of these

Which of the following forms of energy would be illustrated when roasting a marshmallow to the point where it turns black?

• thermal and chemical

• potential, kinetic, thermal, chemical

• gravitational, thermal, chemical

• gravitational and thermal

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4