Energy Calculations

A 50.00kg cheetah has a kinetic energy of 18,000J. How fast is the cheetah running?

• 26.83m/s

• 180m/s

• 360m/s

• 720m/s

In building a sculpture, the sculptor burns 2420j of kinetic energy at 5m/s.

What is his mass (in kilograms)?

• 968kg

• 12,100kg

• 193.6kg

• 96.8kg

A 10.0kg ball rolls at a rate of 2.98 m/s. What is the kinetic energy of the ball?

• 14.9J

• 888J

• 44.4J

• 444J

To release a diamond from its setting, a jeweler heats a 10.0g silver ring (specific heat of 0.235 J/g•⁰C) by adding 23.5J of heat. How much does the temperature of the silver

increase?

• 55.2 ⁰C

• 10.0 ⁰C

• 0.1 ⁰C

• 1000 ⁰C

What is the mass of iron (specific heat of 0.449 J/g•0C) if it takes 125J of heat to raise ____ grams by 2.50C ?

• 111g

• 140g

• 0.00898g

• 22.45g

Find the heat absorbed by Silver if it (specific heat of 0.235 J/g•⁰C) raises 150 grams from 10°C to 28.5°C?

• 21.24J

• 652J

• 0.02898J

• 10,046J

How will 435g of plastic (specific heat of 2.09j/g•⁰C) affect the temperature if it absorbs 7400j of heat?

• 67.27 ⁰C

• 0.1229 ⁰C

• 8.14 ⁰C

• 10,046J

A boy with mass is 600 hectograms skates around a rink at a speed of 10 m/s. How much kinetic energy does he have?

• 30,000J

• 3000J

• 18,000J

• 30J

A ____kg ball is thrown at a speed of 5m/s and has 25j of kinetic energy; what is the mass of the ball?

• 10kg

• 1250J

• 100J

• 2kg

A boy carries a 0.050kg box up a flight of stairs 0.010-km high. How much potential energy has the box gained?

• 0.0049J

• 49J

• 4900J

• 4.9J