Home
Class 12
PHYSICS
A ball of mass 2 kg and another of mass ...

A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ratio of-

A

`1:sqrt2`

B

`sqrt2:1`

C

`1:4`

D

`1:2`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet tall building . After a fall of 30 feet each towards earth , their respective kinetic energies will be the ratio of

A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet tall building . After a fall of 30 feet each towards earth , their respective kinetic energies will be the ratio of

A ball of mass 12 kg and another of mass 6 kg are dropped from a 60 feet tall building after a fall of 30 feet each, towards earth, their kinetic energies will be in the ratio of .

Two bodies of masses 4 kg and 5 kg are moving with equal momentum. Then the ratio of their respective kinetic energies is

Two satellites of same mass are orbiting round the earth at heights of r_1 and r_2 from the centre of earth. Their kinetic energies are in the ratio of :

A ball of mass 5 kg moving with speed 8 m/s collides head on with another stationary ball of mass 15 kg. If collision is perfectly inelastic, then loss in kinetic energ is

Two bodies of mass 1 kg and 2 kg have equal momentum. The ratio of their kinetic energies is:

A body A of mass 4 kg is dropped from a height of 100 m. Another body B of mass 2 kg is dropped from a height of 50 m at the same time. Then :

A ball A of mass m falls on the surface of the earth from infinity. Another ball B of mass 2m falls on the earth from the height equal to six times the radius of the earth. Then ratio of velocities of A and B on reaching the earth is sqrt(x//y) where x and y are coprimes. Find x+y .

A bullet of mass 50g is fired from a gun of mass 2kg. If the total kinetic energy produced is 2050J, the kinetic energy of the bullet and the gun respectively are