Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Gravitation question

2010 · Q164
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Gravitation
  5. /2010 · Q164

Gravitation question

2010 · Q164

NEETPhysicsGravitationMCQ+4 / −1
A man of 50 kg mass is standing in a gravity free space at a height of 10 m above the floor. He throws a stone of 0.5 kg mass downwards with a speed 2 m/s. When the stone reaches the floor, the distance of the man above the floor will be
  1. A
    9.9 m
  2. B
    10.1 m
  3. C
    10 m
  4. D
    20 m
View written solutionFree

Correct answer: B

Since the man is in gravity free space, force on man + stone system is zero.

Therefore centre of mass of the system remains at rest. Let the man goes x m above when the stone reaches the floor, then

Mman × x = Mstone × 10

x=0.550×10x = {{0.5} \over {50}} \times 10x=500.5​×10

x = 0.1 m

Therefore final height of man above floor = 10 + x = 10 + 0.1 = 10.1 m

PreviousNext

More from Gravitation

  • A particle of mass M is situated at the centre of a spherical shell of same mass and radius a. The magnitude of the gravitational potential at a point sutuated at a/2 distance from the centre, will be :2010 · MCQ
  • The radii of circular orbits of two satellites A and B of the earth, are 4R and R, respectively. If the speed of satellite A is 3V, then the speed of satellite B will be2010 · MCQ
  • The figure shows elliptical orbit of a planet m about the sun S. The shaded area SCD is twice the shaded area SAB. If t1 is the time for the planet to move from C to D and t2 is the time to move from A to B then Includes diagram2009 · MCQ
  • Two satellites of earth, S1 and S2 are moving in the same orbit. The mass of S1 is four times the mass of S2. Which one of the following statements is true ?2007 · MCQ
  • The earth is assumed to be a sphere of radius R. A platform is arranged at a height R from the surface of the earth. The escape velocity of a body from this platform is fv, where v is its escape velocity from the surface of the Earth. The…2006 · MCQ
  • For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is2005 · MCQ
  • Imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet is g', then2005 · MCQ
  • The density of a newly discovered planet is twice that of earth. The acceleration due to gravity at the surface of the planet is equal to that at the surface of the earth. If the radius of the earth is R, the radius of the planet would be2004 · MCQ