List of practice Questions

Two spherical bodies of mass M and 5M and radii R and 2R are released in free space with initial separation between their centres equal to 12 R. If they attract each other due to gravitational force only, then the distance covered by the smaller body before collision is

The earth (mass = $ 6 \times {10}^{24} $ kg) revolves around the sun with an angular velocity of $ 2 \times {10}^{-7} rad/s$ in a circular orbit of radius $ 1.5 \times {10}^8 km$. The force exerted by the sun on the earth, in newton, is