GPE and KE Worksheet #2



4-2-1 Name ________________________Period ________Date _______________GPE and KE Worksheet #1 (show your work)Energy in motion is called? _______________Stored energy is called? __________________Energy is measured in? _______________ The formula for Kinetic energy is? _________________________The formula for gravitational potential energy is? ______________________What is the GPE of a 3 kg block 10 m above the floor? What is the KE of a 6 kg mass at 4 m/s? What is the GPE of a 2 kg ball that is 5 m above the floor? What is the KE of a 10 kg mass at 1 m/s? What is the GPE of a 10 kg rock that is 100 m above the earth? Martha throws a 1 kg ball straight up and it reaches a height of 10 m. What is its GPE at its highest point? What is the KE of a 20 kg mass at 9 m/s? Which has more GPE, a 4 kg ball at 20 m or a 7 kg rock at 11 m in height? What has more KE, an 8 kg mass at 11 m/s or a 2 kg mass at 25 m/s? Which has more GPE a 2.5 kg book at 4 meters or a 1 kg paperweight at 8 m in height? How high do you have to lift a 1 kg box of candy to give it 98 J of GPE? What is the mass of an object that has 324 J of KE when moving at 9 m/s? A 10 kg mass has a KE of 125 J, what is its velocity? What has more energy, a 4 kg mass at 11 m/s or a 12 kg mass 2 m above the ground? What has more energy, a 20 kg mass moving at 9 m/s, or a 4 kg mass 25 m above the floor? 4-2-2 Name:______________________________________ Date:________________ Class:_____5721985137160Practice Problems- Potential and Kinetic EnergyGPE = mghKE = ? mv2 A rifle can shoot a 0.0042 kg bullet at a speed of 965 m/s. Find the kinetic energy of the bullet. An automobile to be transported by ship is raised 7.3 m above the dock. If its GPE is 66,375 J, what is the car’s mass?A 725 kg car has a KE of 302,000J. How fast is the car traveling?A cheetah can run with a speed of 31 m/s. If its mass is 47 kg, what is its KE?If a meteor traveling with a speed of 70,000 m/s has a KE of 425,900,00 J, what is its mass?A sea turtle has a mass of 860 kg. If the GPE of the turtle is 20,500 J as it is being lifted onto a ship, how high above the water is the turtle?Calculate the kinetic energy of a 750 kg car moving at 13.9 m/s. What is the kinetic energy of the car if the speed is doubled? A large chunk of ice with mass 15 kg falls from a roof 8 meters above the ground. Find the potential energy of the ice.5787390125730A bike rider approaches a hill with a speed of 8.5 m/s. The total mass of the bike and the rider is 85 kg. Find the kinetic energy of the bike and rider. A high jumper has a mass of 85.0 kg and a GPE of 1970 J. How high does he jump?A 1750 kg weather satellite has a GPE of 169,311,000J. How high above the earth’s surface is the satellite?Identical twins Pat and Chris are painting a house. Pat is standing on the scaffolding 5 meters above the ground. Chris is standing on the scaffolding 5 meters above Pat. Who has more potential energy? Explain.A ping-pong ball has a mass of 0.0025 kg. If the ball is hit with a speed of 4.1 m/s, what is its KE?What is the GPE of a 73 kg tourist on a tower that is 323 m above the ground?The world record for pole vaulting is 6.15 m. If the vaulter’s GPE is 4942 J, what is his mass?The KE of a golf ball is measured to be 143.3 J. If the golf ball has a mass of 0.047 kg, what is its speed?What is the mass of a child that has a KE of 400 J who is riding her bike at 3.9 m/s?If a bird lands on top of a tower and has a GPE of 2033 J, what is the bird’s mass? The peak of the tower is 629 m above the ground.Jared and Clay are climbing the stairs. Jared gets tired and stops halfway to the fourth floor. Clay makes it to the fourth floor without a problem. If Jared is twice as heavy as Clay, who has more potential energy? Explain.4-3-3 ................
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