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mcq on Gravitation Class 9. We covered all the mcq on Gravitation Class 9 in this post for free so that you can practice well for the exam.
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mcq on Gravitation for Students
An empty sealed drum and a filled drum of identical size will experience
(a) equal buoyant force
(b) the same volume
(c) both (a) and (b)
(d) neither (a) nor (b)
Option c – both (a) and (b)
The value of gravitational acceleration near the Earth’s surface is given by
(a) g = GM/R²
(b) g = GMm/d²
(c) both (a) and (b)
(d) neither (a) nor (b)
Option a – g = GM/R²
The weight of an object located at the Earth’s center, with radius R, is
(a) zero
(b) infinite
(c) R times the weight on the surface
(d) 1/R² times the weight on the surface
Option a – zero
When an apple falls from a tree, the gravitational force between the apple and Earth is
(a) F1 is much greater than F2
(b) F2 is much greater than F1
(c) F1 is slightly greater than F2
(d) F1 and F2 are equal
Option d – F1 and F2 are equal
The appropriate expression for the gravitational force between Earth and an object on its surface is
(a) F = mg
(b) F = gM/r²
(c) F = G × M × m/d²
(d) all of these
Option c – F = G × M × m/d²
The universal law of Gravitation accounts for
(a) the force keeping us grounded on Earth
(b) the motion of celestial bodies like the moon and planets
(c) ocean tides influenced by the moon and sun
(d) all of these phenomena
Option d – all of these phenomena
The minimum apparent weight of an object immersed in a Fluid is
(a) greater than zero
(b) zero
(c) less than zero
(d) dependent on the densities of the object and Fluid
Option b – zero
When a heavy cylinder of length 1 is gradually removed from a liquid, the weight felt
(a) remains unchanged
(b) increases as it is lifted
(c) decreases during removal
(d) rises until reaching its full weight in air
Option d – rises until reaching its full weight in air
Relative density of a material
(a) is the ratio of the material’s density to that of air
(b) is the ratio of the material’s density to that of water
(c) has no units
(d) both (b) and (c)
Option d – both (b) and (c)
Choose the correct statement:
(a) Objects with density less than that of a liquid will float
(b) Objects with density greater than that of a liquid will sink
(c) both (a) and (b)
(d) none of the above
Option c – both (a) and (b)
Archimedes’ principle states:
(a) A submerged object experiences an upward force equal to the weight of the Fluid displaced
(b) A floating object is pushed downward by the weight of the liquid below it
(c) A submerged object is lifted by a force equal to the difference in their weights
(d) all statements are valid
Option a – A submerged object experiences an upward force equal to the weight of the Fluid displaced
The upward force exerted by a liquid on an object is called
(a) buoyant force
(b) upthrust
(c) the object’s force on the liquid
(d) both (a) and (b)
Option d – both (a) and (b)
The buoyant force experienced by a body depends on
(a) the object’s Mass
(c) the Fluid’s density
(d) the object’s weight
Option c – the Fluid’s density
Upthrust changes as a body is removed from a liquid. Given: A: It depends only on the volume submerged B: Volume = cross-sectional area × length
(a) Only A is true
(b) Only B is true
(c) Both A and B are true
(d) Neither A nor B is true
Option c – Both A and B are true
The value of gravitational acceleration (g)
(a) is greater at the poles than at the equator
(b) is greater at the equator than at the North Pole
(c) is greater at the equator than at the South Pole
(d) becomes zero at the equator
Option a – is greater at the poles than at the equator
Four students measure gravity at Ooty, Nainital, Mount Everest, and Shimla. The lowest gravity is found
(a) at Ooty, being the tallest location
(b) at Mount Everest, due to its height
(c) at Nainital, where only latitude matters
(d) at Shimla, due to its cold temperature
Option b – at Mount Everest, due to its height
The sign of g is considered
(a) positive when an object is in free fall
(b) negative when thrown upward
(c) positive in both scenarios
(d) both (a) and (b)
Option d – both (a) and (b)
Weight of a body refers to
(a) the object’s Mass
(b) the force by which it is pulled toward Earth
(c) the product of its Mass and gravity
(d) both (b) and (c)
Option d – both (b) and (c)
The force applied perpendicular to a surface is called
(a) buoyant force
(b) thrust
(c) surface tension
(d) none of the above
Option b – thrust
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