How a swimmer jumping from a height is able to increase the number of loops made in the air?

The angular velocity of a wheel increases form 100 rps to 300 rps in 10 sec.The number of revolutions made during this time is :

How does the self inductance of an air coil change, when the number of turns in the coil is decreased?

A test charge q is made to move in the electric field of a point charge Q along two different closed paths. Fig. First path has sections along and perpendicular loop of the same area as the first loop. How does the work done compare in the two cases?

How can gamma be determined from the number of degrees of freedom?

A motorcyclist loops the loop of radius 8 m.From what minimum height must he start in order to roll down and go around the loop?

A closed cylindrical tank of radius 7 m and height 3 m is made from a sheet of metal. How much sheet of metal is required?