Which object has the greatest kinetic energy?

• A car driving down a hill.

• A person running down a hill.

• A ball rolling down a hill.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

6. Where would this tossed baseball have the least amount of kinetic energy?

• Point W

• Point X

• Point Y

• Point Z

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which of the following conversions is illustrated with a solar powered car?

• mechanical to chemical

• light to mechanical

• chemical to mechanical

• light to electrical

Which of the following shows the best examples of the energy conversion in a battery powered flashlight?

• Chemical >>> Electrical >>> Radiant

• Electrical >>> Mechanical >>> Chemical

• Mechanical >>> Radiant >>> Electrical

• Radiant >>> Electrical >>> Chemical

8. A television converts electricity into

• sound

• light

• heat

• chemicals

Tags

NGSS.MS-PS4-2

Lilly's cat has a mass of 5 kg. He is running North at a speed of 3 m/s. What is the kinetic energy of the cat as he runs?

KE= 1/2mv2

• 8.5 J

• 7.5 J

• 45 J

• 22.5 J

Tags

NGSS.MS-PS3-1

Calculate the potential energy of a car with a 2,500 kg mass that is on a hill 100 meters above sea level.

PE=mgh

• 250,000 J

• 2,451,663 J

• 2,450,000 J

• 248 J

Tags

NGSS.MS-PS3-2

If the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C?

• -80,371.2 J

• 80,371.2 J

• 44,938.6 J

• 112,575.9 K

Tags

NGSS.HS-PS3-1

Which will heat up faster?

• copper

• granite

• Iron

• basalt

Tags

NGSS.MS-PS3-4

Specific heat of water is 4.18 J/g°C. Specific heat of wood is 1.760 J/g°C What material needs more heat energy to raise the temperature?

• Water

• Wood

• Both wood and water