The escape speed of a projectile on the earth’s surface is `11.2 km s^-1` A body is projected out with thrice this speed. What is the speed of the body far away from the earth? Ignore the presence of the sun and other planets.

Does the escape speed of a body from the earth depend on the mass of the body,

Does the escape speed of a body from the earth depend on the location from where it is projected,

Does the escape speed of a body from the earth depend on the height of the location from where the body is launched?

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.

An echo was heard after 3s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 ms^-1 ?

A saturn year is 29.3 times the earth year. How far is the saturn from the sun if the earth's 1.5 xx 10^8 km away from the sun.

A trolley of mass 200 kg moves with a uniform speed of 36 km/ h on a frictionless track. A child of mass 20 kg runs on the trolley from one end to the other (10 m away) with a speed of 4 m s^-1 relative to the trolley in a direction opposite to the its motion, and jumps out of the trolley. What is the final speed of the trolley? How much has the trolley moved from the time the child begins to run?

Two billiard balls each of mass 0.05 kg moving in opposite directions with speed 6 m s~1 collide and rebound with the same speed. What is the impulse imparted to each ball due to the other?

If g is the acceleration due to gravity at the earth’s surface and r is the radius of . the earth, the escape velocity for a body to escape out of earth’s gravitation field is :

Two artificial satellites, one close to the surface and other away are revolving around the earth. Which of them has larger speed?