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Energy Quiz: Test Your Knowledge on Work, Power, and Energy Concepts

Test your knowledge on work, energy, and power with this quiz covering various concepts and multiple-choice questions. Grab a pencil, paper, and calculator to challenge yourself!

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Energy Quiz: Test Your Knowledge on Work, Power, and Energy Concepts

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  1. You will need: Pencil, paper, calculator

  2. Energy Quiz 1-18-06

  3. True or False • The units of work are the same as the units of energy. • Potential energy is energy due to the motion of an object. • Any moving object will keep moving until the energy in it runs out. • A body moving at 3 m/s has half the energy of the same object moving at 6 m/s.

  4. Work is equal to the product of force and time. • A joule is equivalent to a newton·meter. • A weightlifter holding a 100-kg barbell over his head is doing twice as much work as a weightlifter holding a 50-kg barbell over his head. • Power is the rate at which energy is created. • Potential energy and kinetic energy are both forms of mechanical energy. • The unit of power is the watt.

  5. Multiple choice: • The gravitational potential energy of a falling object is transformed into • a. power • b. weight • c. speed • d. kinetic energy • e. work • A 100-watt light bulb uses energy at the rate of • a. 100 joules per hour • b. 10 joules in ten seconds • c. 100 joules per second • d. 100 joules per minute

  6. The gravitational potential energy of a 1-kg mass that is 3 meters from the floor is • a. 3 kg·m • b. 3 m/kg • c. 29.4 joules • d. 3 joules

  7. The diagram represents a 20-N force pulling a 5-kg object up a hill at a constant rate of 2 meters per second. The kinetic energy of the moving object is • a. 50 J • b. 15 J • c. 10 J • d. 5 J 30 m 20 N 5kg 10 m

  8. At what point in its fall does the kinetic energy of a freely falling object equal its potential energy? • a. at the start of the fall • b. at all points during the fall • c. halfway between the start and the end • d. at the end of the fall • A basketball player who weighs 600 N jumps 0.5 meters off the floor. What is her kinetic energy just before hitting the floor? • a. 600 J • b. 30 J • c. 300 J • d. 60 J

  9. A force of 2 newtons drags a 2.5 N shoe across the floor at constant velocity for 2 meters. What is the work done against friction? • a. 4 J • b. 1 J • c. 0 J • d. 5 J • e. 10 J

  10. Switch papers with someone. Count the number correct and write it at the top of the paper. • C • C • C • C • A • T • F • T • T • D • C • T • F • F • F • F • T

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