A 10 N force moves an object 2 m in its direction. What work is done?
A) 5 J B) 10 J C) 100 J D) 20 J Answer: D Explanation: Work equals force times displacement […]
Physics, Work, Energy & Power
Work, Energy & Power
Physics, Work, Energy & Power
A 100 W lamp runs for 10 seconds. How much energy does it use?
A) 10 J B) 100 J C) 10000 J D) 1000 J Answer: D Explanation: Energy equals power times elapsed […]
Physics, Work, Energy & Power
A 2 kg object is raised 5 m with g = 10 m/s². What energy is gained?
A) 10 J B) 25 J C) 100 J D) 1000 J Answer: C Explanation: Gravitational potential energy gained is […]
Physics, Work, Energy & Power
A 2 kg object moves at 3 m/s. What is its kinetic energy?
A) 9 J B) 3 J C) 6 J D) 18 J Answer: A Explanation: Kinetic energy is one half […]
Physics, Work, Energy & Power
A constant 10 N force acts along a displacement of 9 m. How much work is done?
A) 45 J B) 135 J C) 90 J D) 180 J Answer: C Explanation: Use work = force × […]
Physics, Work, Energy & Power
A constant 5 N force acts along a displacement of 4 m. How much work is done?
A) 10 J B) 30 J C) 40 J D) 20 J Answer: D Explanation: Use work = force × […]
Physics, Work, Energy & Power
A constant 6 N force acts along a displacement of 5 m. How much work is done?
A) 15 J B) 45 J C) 30 J D) 60 J Answer: C Explanation: Use work = force × […]
Physics, Work, Energy & Power
A constant 7 N force acts along a displacement of 6 m. How much work is done?
A) 21 J B) 42 J C) 63 J D) 84 J Answer: B Explanation: Use work = force × […]
Physics, Work, Energy & Power
A constant 8 N force acts along a displacement of 7 m. How much work is done?
A) 56 J B) 28 J C) 84 J D) 112 J Answer: A Explanation: Use work = force × […]
Physics, Work, Energy & Power
A constant 9 N force acts along a displacement of 8 m. How much work is done?
A) 36 J B) 108 J C) 144 J D) 72 J Answer: D Explanation: Use work = force × […]