Vocabulary Work Problems Potential Energy Problems Kinetic Energy Problems Extra Questions

Question Anything that can cause change

Answer 1 – 10 What is… energy

Question Stored energy due to position

Answer 1 – 20 What is… potential energy

Question Energy due to motion

Answer 1 – 30 kinetic energy

Question force multiplied by distance in the same direction as the force

Answer 1 – 40 work

Question Energy cannot be created or destroyed only transferred from one form to another

Answer 1 – 50 Law of Conservation of Energy

Question A boy pushes on a car with a force of 500 N. The car does not move. How much work does the boy do?

Answer 2 – 10 0 J (No work)

Question What are the units for work?

Answer 2 – 20 Joules (J)

Question In order for work to be done force and distance must be in what direction?

Answer 2 – 30 the same direction

Question Calculate the work done to lift a barbell 1.5 m with a force of 300 N?

Answer 2 – J

Question How far did a baseball travel if a force of 100 N was applied and 200 J of work was done?

Answer 2 – 50 2 meters

Question What are the units for potential energy?

Answer 3 – 10 Joules (J)

Question When calculating potential energy, the equation is E p =mgh. What does g stand for? What value does it have?

Answer 3 – 20 Gravity 10 m/s/s

Question What is the potential energy of a book that is 3 meters off the ground and has a mass of 2 kg?

Answer 3 – J

Question If a 70 kg barbell is lifted off the ground 2 m, what is the potential energy of the barbell?

Answer 3 – 40 1,400 J

Question How high is a bird that has a potential energy of 50 J and has a mass of 0.5 kg?

Answer 3 – m

Question What is the equation to solve for kinetic energy?

Answer 4 – 10 KE=1/2*m*v 2

Question What are the units for Kinetic energy?

Answer 4 – 20 Joules (J)

Question A medicine ball has a mass of 5 kg and is thrown with a speed of 2 m/s. What is the kinetic energy?

Answer 4 – J

Question If I double the mass of an object, what happens to its kinetic energy?

Answer 4 – 40 KE doubles

Question If I double the speed of an object, what happens to its kinetic energy?

Answer 4 – 50 KE is 4 times bigger

Question One book is sitting on the floor. Another book is sitting on the table. Assuming both books have the same mass, which one has more potential energy?

Answer 5 – 10 The book on the table

Question Why did the bowling ball not hit Bill Nye in the face?

Answer 5 – 20 kinetic energy can’t be greater than potential energy.

Question Kinetic energy of an object depends on what two things?

Answer 5 – 30 mass and velocity

Question In the lab, which height gave the tennis ball the most kinetic energy?

Answer 5 – 40 1 m

Question A 20 kg object falls 2 meters to the floor. At what point does kinetic energy equal potential energy?

Answer 5 – 50 Halfway to the floor

Final Jeopardy A 1 kg coconut falls out of a tree from a height of 12 m. Determine the coconut’s potential and kinetic energy at each point shown in the picture. Its speed is zero at point A.