[" (c) "1.4km/s" (d) "14m/s],[" A car when passes through a convex bridge exerts a "],[" force on it which is equal to "]

A car when passes through a convex bridge exert a force on it which is equal to :

When a car crosses a convex bridge, the bridge exerts a force on it. It is given by

In a rocket, fuel bums at the rate of 1 kg/s. This fuel is ejected from the rocket with a velocity of 60 km/s. This exerts a force on the rocket equal to

In a rocket, fuel bums at the rate of 1 kg/s. This fuel is ejected from the rocket with a velocity of 60 km/s. This exerts a force on the rocket equal to

A motor car of m travels with a uniform speed v on a convex bridge of radius r . When the car is at the middle point of the bridge, then the force exterted by the car on the bridge is