A body of mass 5 kg is acted upon by two perpendicular forces 8 N and 6 N. Give the magnitude and direction of the acceleration of the body.

A body of mass 1 kg is made to oscillate in turns on springs of force constant 16 N/kg. Deduce the angular frequency.

A helicopter of mass 1000 kg rises with a vertical acceleration of 15 m s^2. The crew and the passengers weigh 300 kg. Give the magnitude and direction of the (a) force on the floor by the crew and passengers, (b) action of the rotor of the helicopter on the surrounding air, (c) force on the helicopter due to the surrounding air.

A body of mass 2kg is lying on a rough inclined plane of inclination 30^@ . Find the magnitude of the force needed to make the block move down the incline.

Give -the magnitude and direction of the net force acting on a cork of mass 10 g floating on water,

A body of mass 2kg is lying on a rough inclined plane of inclination 30^@ . Find the magnitude of the force needed to make the block move up the incline. Coefficient of static friction is 0.2

A constant force acting on a body of mass 3.0 kg changes its speed from 2.0 m s^-1 to 3.5 m s^-1 in 25 s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force?

Give -the magnitude and direction of the net force acting on a kite skillfully held stationary in the sky,

A body of mass 150 kg is moving with a velocity 20 m/s and it takes 5 sec. to stop after the brakes are applied. Find the.acceleration and applied force.

A block of mass 25 kg is raised by a 50 kg man in two different ways as shown in Fig. 5.19. What is the action on the floor by the man in the two cases? If the floor yields to a normal force of 700 N, which mode should the man adopt to lift the block without the floor yielding?