Do we need a banked road for a two wheeler ? Explain.

While driving along an unbanked circular road, a two- wheeler ride has to lean with the vertical. Why is it so? With what angle the rider has to lean? Derive the relevant expression . Why such a leaning is not necessary for a four wheeler?

Calculate the optimum speed and maximum speed of a four wheeler travelling along a curve track of radius 80 m. If the road is banked at an angle of 21^@ 48' and the coefficient of friction between the tyres and the road is 0.5.

The maximum safe speed for which a banked road is intended , is to be increased by 20%. IF the angle of banking is not changed , then the radius of curvature of the road should be changed from the 30 m to

Why are curved roads banked ?

How do we find age of fossils ?

Do reaction of photosynthesis called, as 'Dark Reaction' need light? Explain.

How many terms of the A.P 16,14,12,….. Are needed to obtain the sum 60?Explain why we get two answers.

A lemon sinks in a glass filled with water but it floats when we stir in two spoons of salt in the water. Explain why.