1. The value of g at a particular point is 9.8 m/sec² suppose the earth suddenly shrink uniformly to half its present size without losing any mass. The value of g at the same point (assuming that the distance of the point from the centre of the earth does not shrink) will become

2. A missile is launched with a velocity less than the escape velocity. The sum of its kinetic and potential energy is

3. If the radius of the earth were to be raise by 1% its mass remaining the same, the acceleration due to gravity on the surface of the earth will

4. A body is projected vertically from the surface of the earth of radius R with velocity equal to half of the escape velocity. The maximum height reached by the body is

5. The escape velocity of projection from the earth is approximately (R = 6400 km)

6. Who among the following first gave the experimental velocity of G?

7. A satellite S is move in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth .

8. The mean radius of the earth is R, its angular speed on its own axis is w and the acceleration due to gravity at earths surface is g. The cube of the radius of the orbit of a geo-stationary satellite will be

9. If the distance between the earth and the sun were half its present value, the number of day in a year would have been

10. The masses of two planets are in the ratio 1 : 2. Their radii are in the ratio 1 : 2. The acceleration due to gravity on the planets are in the ratio.