Q1 of 46 Page 249

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 law of gravitation states that the gravitational force between 2 objects is proportional to the product of the masses of the 2 objects and inversely proportional to the square of the distance between them.


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21

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.

 1

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

 2

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

 2

The figure represents two bodies of masses 10 kg and 15 kg, moving with an initial velocity of 10 ms-1 and 5 ms-1 respectively. They collide with each other. After collision, they move with velocities 4 ms-1 and 9 ms-1 respectively. The time of collision is 2 s. Now calculate F1 and F2