A student wearing sharp pointed heeled shoes is likely to damage a soft wooden floor. Explain.

the initial velocity of a body 20kg is 4m/s. how long would a constant force of 5N act on the body to double its kinetic energy

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

Why is efficiency of a machine is always less than 100% ?

How come in free fall you feel weightless even though gravity is pulling down on you?

Give a reason why mass of a body is constant everywhere.

An arrow of mass 20g traveling horizontally strikes a block of wood of mass 1980g resting on a horizontal surface. The impact takes 0.2s before the two move together with an initial velocity of 5m/s. Calculate: a. The velocity of the ...