Question 1

During a baseball game, the pitcher throws a 0.145 kg baseball at a velocity of 40 m/s.  What is the Kinetic Energy of the baseball?

Accepted Answer

116 Joules

Answer

2.9 Joules

Answer

276 Joules

Answer

5.8 Joules

Question 2

A bowler threw a 5.2 kg bowling ball down the alley at a velocity of 8.05 m/s.  How much kinetic energy did the bowling ball have?

Accepted Answer

168 Joules

Answer

337 Joules

Answer

41.86 Joules

Answer

20.93 Joules

Question 3

A 53.0 kg jogger jogs down the street at 1.92 m/s.  What is the jogger's kinetic energy?

Accepted Answer

97.7 Joules

Answer

101.8 Joules

Answer

2,697 Joules

Answer

50.88 Joules

Question 4

Ms. Northcutt's  chiweenie, Ty, escaped the yard once again and maintains a velocity of 1.65 m/s running away from Ms. Northcutt.  If the dog's mass is 4.99 kg, what is the chiweenie's kinetic energy?

Accepted Answer

6.79 Joules

Answer

4.12 Joules

Answer

20.54

Answer

8.23 Joules

Question 5

Ms. Northcutt's neurotic doberman, Chloe, gets spooked on a walk, breaking free from the leash and running home at a velocity of 5.3 m/s.  If Chloe's Kinetic Energy is 541.6 Joules, what is Chloe's mass?  (Remember, mass will be in kilograms, not pounds)

Accepted Answer

38.56 kg

Answer

102.2 kg

Answer

85 kg

Answer

204.4 kg

Question 6

A motorcyclist is maintaining a constant velocity of 20.12 m/s.  If the total kinetic energy is 51,330 Joules, what is the combined mass of the motorcycle and rider?

Accepted Answer

253.6 kg

Answer

126.8 kg

Answer

5102 kg

Answer

2551 kg

Question 7

Marty has a mass of 44.5 kg and maintains a velocity of 2.24 m/s.  What is his Kinetic Energy?

Accepted Answer

111.6 Joules

Answer

99.68 Joules

Answer

49.84 Joules

Answer

223.3 Joules

Question 8

Clyde has a mass of 89.0 kg and maintains a velocity of 2.24 m/s, his maximum speed.  What is Clyde's Kinetic Energy?

Accepted Answer

223.3 Joules

Answer

199.4 Joules

Answer

39.73 Joules

Answer

99.68 Joules

Question 9

Marty can maintain a velocity of 4.47 m/s.  His mass is 44.5 kg.  What is Marty's Kinetic Energy when he is maintaining this velocity?

Accepted Answer

444.6 Joules

Answer

99.46 Joules

Answer

19.91 Joules

Answer

889.2 Joules

Question 10

Marty and Clyde both want to join the school football team.  Clyde has twice the mass Marty does, but Marty can maintain twice the velocity as Clyde.  Which can achieve a greater Kinetic Energy, Marty or Clyde, and why?

Accepted Answer

Marty, because velocity is squared in the equation so it creates the greater kinetic energy.

Answer

Clyde, because more mass in football always means the player is better at tackling.

Answer

Clyde, because he has more mass to move, creating greater kinetic energy.

Answer

Marty, because he is more agile and able to run around the bigger players easily.

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