Physics
Railway tracks are banked on curves so that

The train may not fall down inwards
No frictional force may be produced between the tracks and the wheels of the train
Necessary centripetal force may be obtained from the horizontal component of the weight of the train
Necessary centrifugal force may be obtained from the horizontal component of the weight of the train

ANSWER DOWNLOAD EXAMIANS APP

Physics
The term ''equinox' means

When the day and night are of equal duration
The axis of the Earth around which it rotates
The path which the Earthtakes around the Sun
The time when the Sun seems to be going round and round in the sky in the Arctic but does not go below the horizon

ANSWER DOWNLOAD EXAMIANS APP

Physics
A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ?

B will reach the ground first.
A will reach the ground first.
The question is incomplete because the masses of the spheres are not given.
Both the spheres will reach the ground simultaneously.

ANSWER DOWNLOAD EXAMIANS APP