A mass thrown up returns to the surface of earth. What is the nature of total energy possessed?

What is the mass of the earth?

What is surface energy? What is its unit?

Is potential energy on the surface of earth always zero?

As you have learnt in the text, a geostationary satellite orbits the earth at a height of nearly 36,000 km from the surface of the earth. What is the potential due to earth’s gravity at the site of this satellite? (Take the potential energy at infinity to be zero). Mass of the earth = 6.0 xx 10^24 kg, radius = 6400 km

A body weighs 63 N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth?

What is escape velocity? Find an expression for the escape velocity of a body when projected from the surface of the earth. Show that the escape velocity form the earth's surface is about 11.2 km/sec.

A mass m collides with another mass 2m and sticks to it. What is the nature of the collision?

Two masses in the ratio 1 : 2 are thrown vertically up with the same speed. What is the effect on the time by the mass?