Embed Size (px)
Citation preview
Calculating GPE and KE
GPE = mghKE = ½mv2
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
How to solve:
• Circle the numbers in the problem.
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
How to solve:
• Circle the numbers in the problem.• Underline what you will be solving.
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
How to solve:
• Circle the numbers in the problem.• Underline what you will be solving.• Rewrite them below the problem. (Include units.)
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
8 kg0.4 meters
GPE = mass x gravity x height
How to solve:
• Circle the numbers in the problem.• Underline what you will be solving.• Rewrite them below the problem. (Include units.)
• Label the variables.
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
8 kg0.4 meters
GPE = mass x gravity x height
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
8 kg0.4 meters
mass =height =
GPE = mass x gravity x height
How to solve:
• Circle the numbers in the problem.• Underline what you will be solving.• Rewrite them below the problem. (Include units.)
• Label the variables.• Substitute the numbers into the equation.
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
8 kg0.4 meters
mass =height =
GPE = mass x gravity x height
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
8 kg0.4 meters
mass =height =
GPE = 8 kg x gravity x 0.4 m
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
8 kg0.4 meters
mass =height =
GPE = 8 kg x gravity x 0.4 mDon’t forget gravity!
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
8 kg0.4 meters
mass =height =
GPE = 8 kg x 9.8 m/s2 x 0.4 m
How to solve:
• Circle the numbers in the problem.• Underline what you will be solving.• Rewrite them below the problem. (Include units.)
• Label the variables.• Write down the equation.• Substitute the numbers into the equation.• Solve.
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
8 kg0.4 meters
mass =height =
GPE = 8 kg x 9.8 m/s2 x 0.4 m
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
8 kg0.4 meters
mass =height =
GPE = 8 kg x 9.8 m/s2 x 0.4 mGPE = 31.4
How to solve:
• Circle the numbers in the problem.• Underline what you will be solving.• Rewrite them below the problem. (Include units.)
• Label the variables.• Write down the equation.• Substitute the numbers into the equation.• Solve. (Include units.)
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
8 kg0.4 meters
mass =height =
GPE = 8 kg x 9.8 m/s2 x 0.4 mGPE = 31.4 J
1. Calculate the potential energy of an 8 kg cat that is 0.4 meters off the ground.
8 kg0.4 meters
mass =height =
GPE = 8 kg x 9.8 m/s2 x 0.4 mGPE = 31.4 J
2. A cow with a mass of 600 kg is 3 meters above water. What is its potential energy?
3. What is the GPE of a 90 kg man who is 150 m off the ground?
4. Calculate the potential energy of 100 kg man when 300 m off the ground.
5. How much kinetic energy does a 10 kg cat falling at 10 m/s have?
How to solve:
• Circle the numbers in the problem.• Rewrite them below the problem. (Include units.)
• Label the variables.• Underline what you will be solving.• Write down the equation.• Substitute the numbers into the equation.• Solve. (Include units.)
5. How much kinetic energy does a 10 kg cat falling at 10 m/s have?
6. Calculate the KE of moving car with a mass of 2000 kg and a velocity of 30 m/s.
7. What is the KE of Cristiano Ronaldo running at 4 m/s? His mass is 85 kg.
8. If a 7 kg cat has a velocity of 0 m/s, how much KE does it have?
