03b Potential and Kinetic Energy Problems SS Key .pdf

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Original filename: 03b_Potential_and_Kinetic_Energy_Problems_SS_Key.pdf
Title: Potential and Kinetic Energy Problems
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Potential and Kinetic Energy
Problems
1. What is the potential energy of a rock
that weighs 100 Newtons that is sitting
on top of a hill 300 meters high?

Potential and Kinetic Energy
Problems
1. What is the potential energy of a rock
that weighs 100 Newtons that is sitting
on top of a hill 300 meters high?

PE = mgh

Potential and Kinetic Energy
Problems
1. What is the potential energy of a rock
that weighs 100 Newtons that is sitting
on top of a hill 300 meters high?

PE = mgh
PE = 100N x 300m

Potential and Kinetic Energy
Problems
1. What is the potential energy of a rock
that weighs 100 Newtons that is sitting
on top of a hill 300 meters high?

PE = mgh
PE = 100N x 300m
PE = 30,000N*m

Potential and Kinetic Energy
Problems
1. What is the potential energy of a rock
that weighs 100 Newtons that is sitting
on top of a hill 300 meters high?

PE = mgh
PE = 100N x 300m
PE = 30,000N*m
PE = 30,000J

Potential and Kinetic Energy
Problems
2. What is the kinetic energy of a bicycle
with a mass of 14 kg traveling at a
velocity of 3 m/s?

Potential and Kinetic Energy
Problems
2. What is the kinetic energy of a bicycle
with a mass of 14 kg traveling at a
velocity of 3 m/s?
KE = ½ mv2

Potential and Kinetic Energy
Problems
2. What is the kinetic energy of a bicycle
with a mass of 14 kg traveling at a
velocity of 3 m/s?
KE = ½ mv2
Square 1st

KE = ½ (14kg)(3m/s)2

Potential and Kinetic Energy
Problems
2. What is the kinetic energy of a bicycle
with a mass of 14 kg traveling at a
velocity of 3 m/s?
KE= ½ mv2

KE = ½ (14kg)(3m/s)2
Multiply 2nd

KE = ½ (14kg) (9m2/s2)

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