A passenger in the bus finds that his suit case suddenly starts sliding backwards. This means that the bus is

A light string passing over a smooth light pulley , connects two blocks of masses m₁ and m₂ (vertically).If the acceleration of the system is (g/8),then the ratio of masses is

Friction is the result of

A shell is fired from a canon, it explodes in mid air, its total 

Consider a car moving along a straight horizontal road with a speed of 72 km/hr.If the coeffecient of static friction between the tyres and the road is 0.5,the shortest distance in which the car can be stopped is

(Take g = 10 m/s²⁾

A body is at rest on the surface of the earth. Which of the following statement is correct?

A certain force applied to a mass m₁ gives it an acceleration of 15 m/s² .The same force applied to a mass m₂ gives it an accelerationof 10 m/sec² .If the two masses are fixed together and the same force is applied to the combination ,find the acceleration.

A body is placed on an inclined plane and has to be pushed down.The angle made by the normal reaction with the vertical will be

A force of 100 N need to be applied parallel to a smooth inclined plane just to hold a body on it. The angle of inclination of the inclined plane is 300. How much horizontal force need to be applied to do the same?

A car of mass m is moving with momentum p.If μ be the coeffecient of friction between the tyres and the road, what will be stopping distance due to friction alone ?