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Efficiency of Machines Quick Check

Questions (5)

A pulley system is operating at only 50% efficiency. How could the efficiency be increased?A) by decreasing the amount of weight
1. 1 answer
2. 146 views
What is the name of the fixed point about which a lever rotates?A) fulcrum B) pulley C) groove D) bar
1. 1 answer
2. 107 views
What can be done to improve the efficiency of a ramp?A) smooth the surface B) insulate the surface with foam C) make it shorter
1. 1 answer
2. 69 views
Why are incandescent light bulbs considered to be lower efficiency than LED bulbs?A) a smaller amount of energy is wasted by the
1. 1 answer
2. 94 views
which car has the greatest efficiency?A) a 900 kg car that travels 15 km per liter of fuel B) a 1,200 kg car that travels 20 km
1. 1 answer
2. 36 views