Two persons manage to push a motorcar of mass`1200kg` at a uniform velocity along a level road. The same motorcar can be pushed by three persons to produce an acceleration of `0.2m//s^(2)`. With what force does each person push the motorcar? (Assume that all persons push the motorcar with the same muscular effort).

A person manages to push a car of mass 800 kg with a uniform velocity along a level road. When another person joins him and pushes the car with an equal force, the acceleration produced is 0.5m//s^(2) . Calculate the force with which each person pushes the car.

A block of mass 10kg is pushed up on a smooth incline plane of inclination 30^(@) , so that it has acceleration 2m//s^(2) . The applied force is

A force F_(1) of 500 N is required to push a car of mass 1000 kg slowly at constant speed on a leveled road. If a force F_(2) of 1000N is applied, the acceleration of the car will be :

Five persons A, B, C,D and E are pulling a cart of mass 100 kg on a smooth surface and cart is moving with acceleration of 3 m//s^(2) in east direction. When person A stops pulling, it moves with acceleration 1 m//s^(2) in the west direction. When person B stops pulling, it move with acceleration 24 m//s^(2) in the north direction. The magnitude of acceleration of the cart, when only A and B pull the cart keeping their direction same as the old directions, is :

Five person A, B, C, D and E are pulling a cart of mass 100 kg on a smooth surface and cart is moving with acceleration 3 m//s^(2) in each direction. When person 'A' stops pulling, it moves with acceleration 1 m//s^(2) in the west direction. When person 'B' stops pulling, it moves with acceleration 24 m//s^(2) in the north direction. The magnitude of acceleration of the cart when only A and B pull the cart keeping their directions same as the old directions, is (25//n) m//s^(2) , value of n is:

A 500kg horse pulls a cart of mass 1500kg along a level road with an acceleration of 1m//s^(2) . if coefficient of sliding friction is 0.2 then force exerted by the earth on horse is .

A person of mass 60kg is inside a lift of mass 940kg and presses the button on control panel. The lift starts moving upword with an acceleration 1.0m//s^(2) . If g=10m//s^(2) , the tension in the supporting cable is.

A person of mass 75 kg works in a where his job is to arrange heavy articles in a stone - room As shown in figure he place a packing of mass 20 kg on a ramp that is inclined to the horizontal at 37^(@) and pushed it up the ramp with an acceleration 1.5ms^(-2) .This is the minimum acceleration for the packege to reach the top to the ramp.THe coefficient of static and friction between the shoes of the person and the ground is 0.8 and coefficient of kinetic friction for the motion of package on the is 0.5 Force of friction acting on the person will be