Which device shows the speed of vehicles ?

A vehicle is travelling with uniform speed along a concave road of radius of curvature 19.6m . At lowest point of concave road is the normal reaction on the vehicle is three times its weight, the speed of vehicle is

A wheel of radius 2.1 m of a vehicle makes 75 revolutions in one minute. What is the speed of the vehicle ?

What was the speed of vehicle C on day 2 in terms of meters per second ?

When a cyclist turns on a circular path,the necessary centripetal force is provided by friction between the tyres and the road. If centripetal force is not provided by friction, then for the vehicle to move on circular path, the track is banked. If the speed of a vehicle is doubled, then for safety of vehicle

The angle of banking theta is (A) independent of mass of vehicle (B)depending on speed of vehicle (C)depending on radius of curvature of curved road. The correct statement (s) is /are

The following graph shows the speed ofabody which is :

When can the speed and average speed of a vehicle be equal?