Physics
Vehicles use ________ to see the objects coming from behind.

Concave mirror
Concave lens
Convex lens
Convex mirror

ANSWER DOWNLOAD EXAMIANS APP

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