Work, Power, and Energy Review Vocabulary to know: Conservation of energy Machine Displacement Mechanical advantage Elastic potential energy Mechanical energy Newton-meter Energy Force Potential energy Fulcrum Power Gravitational potential energy Pulley Screw Incline plane Watt Joule Wheel and axle Kinetic energy Work Lever How is work related to energy? What is the unit for work equal to in SI units? If you carry a book across the room, how much work do you do on the book? True or False: The purpose of a machine is to do less work. True or false: A machine allows a force to be applied over a longer distance. Define compound machine and give at least 3 examples. Give three examples of levers. Which has more power, a lift that raised a car in 20 seconds or a lift that raises the same car in 10 seconds. What is the unit for power? The SI units for power are __________. What is the difference between kinetic and potential energy? Give a situation in which an object can have both kinetic and potential energy. Name two types of potential energy. Which has more energy: a 10 kg rock perched atop a 100 m hill or a 10 kg rock moving at 45 m/s? How does the total mechanical energy in a system change as an object moves from its highest position to its lowest position? Which would have more kinetic energy, ping pong ball moving at 10 m/s or a baseball moving at 10 m/s? How do you know?
Work, Power, and Energy Review Vocabulary to know: Conservation of energy Displacement Elastic potential energy Energy Force Fulcrum Gravitational potential energy Incline plane Joule Kinetic energy Lever Machine Mechanical advantage Mechanical energy Newton-meter Potential energy Power Pulley Screw Watt Wheel and axle Work How is work related to energy? What is the unit for work equal to in SI units? If you carry a book across the room, how much work do you do on the book? True or False: The purpose of a machine is to do less work. True or false: A machine allows a force to be applied over a longer distance. Define compound machine and give at least 3 examples. Give three examples of levers. Which has more power, a lift that raised a car in 20 seconds or a lift that raises the same car in 10 seconds. What is the unit for power? The SI units for power are __________. What is the difference between kinetic and potential energy? Give a situation in which an object can have both kinetic and potential energy. Name two types of potential energy. Which has more energy: a 10 kg rock perched atop a 100 m hill or a 10 kg rock moving at 45 m/s? How does the total mechanical energy in a system change as an object moves from its highest position to its lowest position? Which would have more kinetic energy, ping pong ball moving at 10 m/s or a baseball moving at 10 m/s? How do you know?