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NCAT - Practice Test - Physics - Work and Energy Quiz

Attempt 10 MCQs on NCAT - Practice Test - Physics - Work and Energy | Quiz 7

61. In an electric bulb, what is the useful energy output?



62. When is mechanical energy conserved?



63. A force of 20 N acts at 0° to velocity of 10 m/s. Power is:



64. What energy conversion occurs in a car engine?



65. What energy conversion takes place in a hydroelectric dam?



66. What is the energy conversion in solar panels?



67. A 0.5 kg book is on a shelf 20 m high. Find its potential energy (g=10).



68. When an object is lifted at constant speed, work done against gravity equals:



69. A motor does 1000 J of work in 10 seconds. Its power is:



70. Is kinetic energy a scalar or vector?



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