A ball ? is always in neutral equilibrium. Explain.

Explain why a piece of solid steel weighing a few grams sinks in water but a ship weighing thousands of kilograms can float.

What is the essence of an oil molecule in hydraulic machines?

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.

what is the difference between limiting and dynamic forces of friction?

Distingush between Bernoulli’s effect and Bernoulli’s principle.

Which rays are used in a TV remote?

Name machine which has velocity ratio less than 1

Describe how the oil patch is formed in an oil drop experiment.