Worksheet: Conservation of Energy

Name: ________ Date: ________

Instructions: 1. Read each question carefully. 2. Solve the problems using the conservation of energy principles. 3. Show all your calculations and units. 4. Write your answers in the spaces provided.

Question 1: A roller coaster car starts at the top of a hill with an initial potential energy of 5000 J. As it moves down the hill, it loses 2000 J of potential energy. Calculate the final potential energy of the roller coaster car.

Initial Potential Energy (PEi) = ______ J Energy Lost (ΔPE) = ______ J Final Potential Energy (PEf) = ______ J

Question 2: A ball is dropped from a height of 10 meters. Calculate its final kinetic energy just before it hits the ground. (Assume no energy is lost due to air resistance)

Initial Potential Energy (PEi) = ______ J Final Kinetic Energy (KEf) = ______ J

Question 3: A car with a mass of 1000 kg is traveling at a speed of 20 m/s. Calculate its kinetic energy.

Mass (m) = ______ kg Velocity (v) = ______ m/s Kinetic Energy (KE) = ______ J

Question 4: A light bulb converts electrical energy into light energy. If the bulb consumes 60 J of electrical energy, how much light energy does it produce?

Electrical Energy Consumed = ______ J Light Energy Produced = ______ J

Question 5: A wind turbine converts wind energy into electrical energy. If a turbine generates 5000 J of electrical energy, how much wind energy was converted?

Electrical Energy Generated = ______ J Wind Energy Converted = ______ J

Question 6: A toaster converts electrical energy into thermal energy. If the toaster consumes 100 J of electrical energy, how much thermal energy does it produce?

Electrical Energy Consumed = ______ J Thermal Energy Produced = ______ J

Question 7: A solar panel converts solar energy into electrical energy. If a solar panel generates 2000 J of electrical energy, how much solar energy was converted?

Electrical Energy Generated = ______ J Solar Energy Converted = ______ J

Question 8: A pendulum swings back and forth, converting potential energy into kinetic energy and vice versa. If a pendulum has a maximum potential energy of 100 J, what is its maximum kinetic energy?

Maximum Potential Energy (PE) = ______ J Maximum Kinetic Energy (KE) = ______ J

Question 9: A battery-powered car has an initial kinetic energy of 5000 J. If it comes to a stop, how much energy is lost due to braking?

Initial Kinetic Energy (KEi) = ______ J Energy Lost due to Braking (ΔKE) = ______ J

Question 10: A rocket is launched into space with an initial kinetic energy of 100,000 J. As it reaches its maximum height, its kinetic energy becomes zero. How much potential energy does the rocket gain?

Initial Kinetic Energy (KEi) = ______ J Final Potential Energy (PEf) = ______ J