Why is efficiency of a machine is always less than 100% ?
Category: Mechanical Physics
Mechanical physics is a branch of physics that deals with the motion of material objects under the influence of forces.
Teachers Of Physics Latest Questions
A girl carries 20 litres in a Jerry can on her head and walks for 200 metres on a horizontal level ground. Explain why the girl does no work (Assume air resistance is negligible).
Explain why a piece of solid steel weighing a few grams sinks in water but a ship weighing thousands of kilograms can float.
When a moving car encounters a patch of ice the brakes are applied. Why is it desirable to keep the wheels rolling on the ice without locking up?
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Explain why the handle of a door is placed as far as possible from the hinges. Explain why it is easier to loosen a tight nut using a spanner with a long handle than the one with a short handle.