Dhiren M Doshi Solutions for Chapter: Test Papers 2, Exercise 1: TEST PAPERS

How does the gravitational force between two bodies changes if the distance between them is tripled? Explain.

If the density of two planets is the same, but their radii are in the ratio of $1:2$, prove that the ratio of accelerations due to gravity on their surfaces is also $1:2$.

The weight of a body is $49 \mathrm{N}$. What is its mass?

If the force of the earth on the moon vanishes suddenly, what will be the path of the moon? Give reasons.

How does the force of attraction between the two bodies depend upon their masses and distance between them? Rahul, a class IX student, thought that two bricks tied together would fall faster than a single one under the action of gravity. Do you agree with this hypothesis or not? Give reason for your answer.

Draw velocity-time graph for a uniformly accelerated object. Derive second and third equations of motion by graphical method.

State and verify the law of conservation of momentum.  

Define the terms 'mass' and 'weight'. Write their SI units. Distinguish between mass and weight.