Space Stations are used to study the effects of long-space flight on the human body. justify.

A boy weighing 20 kg is sitting at one end of a see-saw at a distance of 1.2 m from the centre. Where should a man weighing 60 kg sit on the see-saw, so that it stands balanced?

A cart driver prods his horse to move forward. The horse refuses to budge and explains:

“According to Newton’s III Law, I am pulling the cart, with a certain force and the cart, in turn pulls me back with an equal amount of force. As they are equal in magnitude and act in opposite directions, they cancel each other.”

Do you agree with the explanation given by the horse? Support your answer with proper reasons.

is the mathematical form of Newton’s law of gravitation, G - gravitational constant, m₁m₂, are the masses of two bodies separated by a distance d, then give the statement of Newton’s law of gravitation.

Newton’s first law of motion gives a qualitative definition of force. Justify.