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Kinetic Energy Prob

terms and definitions

QuestionAnswer
What is the kinetic energy of a jogger with a mass of 65.0 kg traveling at a speed of 2.5 m/s? m=65 KE= 1/2(65) ⋅ (2.5)2
v=2.5 32.5 ⋅ 6.25
KE= 203.125 KE= 203.125 J
What is the mass of a baseball that has a kinetic energy of 105 J and is traveling at 10 m/s? KE= 100J m= (2⋅100)/5 2
V=5 m= 200/25
m=8 m= 8
What is the kinetic energy of a 0.5 kg soccer ball that is traveling at a speed of 3 m/s? m=0.5 KE= 1/2(0.5) ⋅ (3 2)
v= 3 KE= 0.25 ⋅ 9
KE= 2.25 J
a runner has a mass of 120kg and a speed of 2m/s. What is the runner's kinetic energy? 240 Joules
What is the kinetic energy of a 2,000 boat moving at 5.0 m/s? KE= 1/2(2,000) ⋅ 5(5)
1000 ⋅ 25
KE= 25,000 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 Kinetic energy. Calculate it. KE = 1/2mv2
KE = ? J
m = 2.1 kg
v = 30m/s
KE = ½ x 2.1 kg x (30m/s)2
KE = 945 J
Created by: rufuspat
 

 



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