Home
Class 12
PHYSICS
A small block of super dense material ha...

A small block of super dense material has mass ` 2 xx 10^(24) kg`. It is at a height `h lt lt R `. It falls towards the earth.Find its speed when it is at a height `( h )/( 2)`

A

`sqrt((2gh)/3)`

B

`sqrt((3gh)/4)`

C

`sqrt((3gh)/5)`

D

`sqrt((gh)/2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

A small body of superdense material, whose mass is twice the mass of the earth but whose size is very small compared to the size of the earth, starts form rest at a height H lt lt R above the earth's surface, and reaches the earth's surface in time t . then t is equal to

A small block of superdense material has a mass (M)/(3) , where M is the mass of earth . It is released from rest from a height h ( h lt lt radius of earth) from the surface of earth . The speed of the block at a height (h)/(2) is

A satellite of mass 1000 kg is supposed to orbit the earth at a height of 2000 km above the earth's surface. Find a). its speed in the orbit b). its kinetic energy. c). The potential energy of the earth satelilte system and d). its time period. Mass of the earth =6xx10^24kg .

A satellite of mass 1000 kg is supposed to orbit the earth at a height of 2000 km above the earth's surface. Find a. its speed in the orbit b . its kinetic energy. c . The potential energy of the earth-satellite system and d . its time period. Mass of the earth =6xx10^24kg .

A pendulum bob of mass 10^(-2) kg is raised to a height 5 xx 10^(-2) m and then released. At the bottom of its swing, it picks up a mass 10^(-3) kg . To what height will the combined mass rise?

A body of mass 10 kg moving at a height of 2 m, with uniform speed of 2 m/s. Its total energy is

A body has a weight 72 N. When it is taken to a height h=R = radius of earth, it would weight

What is the change in potential energy of a body of mass 10kg when it is taken to a height of 2R from the earth's surface ? G given

Total energy of a body at rest at a height h from a point of reference is 75 J. What is its kinetic energy as it falls through a height h/2 ?

Calculate the angular momentum and rotational kinetic energy of the earth about its own axis. Given mass of the earth is 6 xx 10^(24) kg and its radius = 6.4 xx 10^3 km. [Moment of inertia of the earth about its axis of rotation is 2/5 mr^(2) ]