Solve the following examples / numerical problems:
If the weight of a body on the surface of the moon is 100 N , what is its mass ?

Solve the following examples / numerical problems: If the acceleration due to gravity on the surface of the earth is 9.8 m/s^2, what will be the acceleration due to gravity on the surface of a planet whose mass and radius both are two times the corresponding quantities for the earth ?

Solve the following examples / numerical problems: If the body is moving at 100 m/s on the earth's surface , what will be its (i) Kinetic energy (ii) total energy ?

Solve the following examples / numerical problems: The mass and weight of an object on the earth are 5 kg and 49 N respectively. What will be their values on the moon? Assume that the acceleration due to gravity on the moon is 1/6th of that on the earth.

Solve the following examples/numerical problems : If the mass of a planet is eight times the mass of the earth and its radius is twice the radius of the earth, what will be the ratio of the escape velocity on the earth to the escape velocity on the planet?

Solve the following examples/numerical problems : If the mass of a planet is 8 times that of the earth and its radius is twice the radius of the earth , what will be the escape velocity for that planet?( Escape velocity for the earth=11.2 km/s)

Solve the following examples / numerical problems: The mass of a planet is four times that of the earth and its radius is double the radius of the earth. The escape velocity of a body from the earth is 11.2xx10^3 m/s. Find the escape velocity of a body from the planet.

Solve the following examples / numerical problems: Find the magnitude of the acceleration due to gravity at the surface of the earth. ( M= 6xx 10^24 kg, R= 6400 km)

Solve the following examples/ numerical problems. If the current passing through a bulb is 0.2 A and the power of the bulb is 20 w., find the voltage applied across the bulb.