Why spokes are provided in a bicycle wheel ?

A bicycle wheel of radius 35cm is making 25 revolutions in 10 seconds.At what speed in km/hr is the cycle moving ? A bicycle wheel makes 5000 revolutions in moving 22km. Find the diameter of the wheel.

Give reason for the following (a) Bicycle wheels are provided with spokes (b) There are two fan a helicopter.

A bug is crawling with constant speed v, along the spoke of a bicycle wheel, of radius a while the bicycle moves down the road with constant speed v. Find the accelerations of the bug as observed by a man standing beside the road, along the perpendicular to the spoke of the wheel.

The wheel in figure has eight equally spaced spokes and of 30 cm . It is mounted on a fixed axle and is spinning at 2.5 rev//s . You want to shoot a 20-cm-long arrow parallel to this axle and through the wheel without hitting any of the spokes. Assume that the arrow and the spokes are very thin. What minimum speed must the arrow and the spokes are very thin. What minimum speed must the arrow have ? .

Write the similarities and differences between the motion of a bicycle wheel and a ceiling fan that has been switched on.

A wheel with N spokes is rotated in a plane - perpendicular to the magnetic field B such emf e is induced between axie and rim of the wheel . In the same wheel number of spokes is made 3 N and the wheel is rotated in the same manner in the same field then new emf is ________ .

Why does oiling the axles of bicycle make the bicycle move more easily ?