Draw graph showing the relation between force and mass for a constant acceleration.

A rocket is moving at a constant speed in space by burning its fuel and ejecting out the burnt gases through a nozzle. Is there any force acting on the rocket? If yes, how much?

Name the S.I. and C.G.S units of force. Write relation between both of them.

How is the force of gravity (or weight) of an object related to its mass?

What is the weight (or force of gravity ) of a body placed at the centre of the earth? Give reason.

Define 1$\mathrm{kgf}$.