A man pushes a box of mass 50kg with a force of 80N. What will be the acceleration of the box? What would be the acceleration if the mass were halved?

What will e the acceleration of a body of mass 5 kg if a force of 200 N is applied on it?

A man throws a ball of mass 0.5 kg vertically upwards with a velocity of 1ms^( -1) . What will be its initial momentum ? What would be its momentum at the highest point of its reach ?

If a planet existed whose mass and radius were both half of that of the eawrth. What would be the acceleration due to gravity at the surface of the planet in terms of that on the surface of the earth?

An object of mass 2 kg falls with a acceleration of 9.8 ms^-2 towards the gorund. With acceleration will an object of mass 4 kg fall?

A rope of negligible mass is wound round a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N ? What is the linear acceleration of the rope ? Assume that there is no slipping.

A rectangular box lies on a rough inclined surface at theta . The co-efficient of friction between the surface and the box is mu. Let the mass of the box is m. What is the force acting on the box down the plane, if the angle of inclination of the plane is increased to alpha>theta ?

A rocket of initial mass 6000 kg ejects mass at a constant rate of 16 kgs^-1 with constant relative speed of 11 kms^-1 . What is the acceleration of the rocket a minute after the blast? (Neglect gravity).