KE & PE

A person walking down the street is an example of which type of energy?

• kinetic energy

• potential energy

A bowling ball sitting on the rack is an example of which type of energy?

• kinetic energy

• potential energy

 There is a bell at the top of a tower that is 45 m high. The bell has a mass of 19.39 kg. The bell has _____________________ energy. Calculate it. (g = 9.8)

 $KE=0.5\times m\times v^2$   $PE=mgh$  

• kinetic, 8,459 J

• kinetic, 19,632 J

• potential, 8,551 J

• potential, 872.55 J

A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has _________________energy. Calculate it. (g = 9.8)

 $KE=0.5\times m\times v^2$   $PE=mgh$  

• kinetic, 25,088,000 J

• kinetic, 896,000 J

• potential, 1,792,000 J

• potential, 439,040 J

A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby has a mass of 1.22 kg. The carriage has ____________ energy. Calculate it. (g = 9.8)

 $KE=0.5\times m\times v^2$   $PE=mgh$  

• kinetic, 15.6 J

• kinetic, 269 J

• potential, 25.62 J

• potential, 251 J

You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. The ball has ______________________ energy. Calculate it.  (g = 9.8)

 $KE=0.5\times m\times v^2$   $PE=mgh$  

• kinetic, 945 J

• kinetic, 900 J

• potential, 617 J

• potential, 66 J