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Question (1)

QN002111

An object floats in water when —

(A) Its weight is greater than the upthrust
(B) Its weight is equal to or less than the upthrust
(C) It has large size only
(D) It has sharp edges

Correct Answer: B

Explanation:

An object floats when upthrust balances or exceeds its weight.

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Question (2)

QN002112

Which force helps objects float in water?

(A) Magnetic force
(B) Frictional force
(C) Upthrust
(D) Muscular force

Correct Answer: C

Explanation:

Upthrust is the upward force exerted by liquid.

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Question (3)

QN002113

A wooden block floats on water because —

(A) Wood has no weight
(B) Water pushes it upward
(C) Gravity does not act on wood
(D) Wood attracts water

Correct Answer: B

Explanation:

Water exerts upward force on the wood.

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Question (4)

QN002114

The upward force exerted by a liquid on an immersed object is called —

(A) Weight
(B) Friction
(C) Upthrust
(D) Tension

Correct Answer: C

Explanation:

Upthrust acts upward on immersed objects.

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Question (5)

QN002115

Which of the following objects is most likely to sink in water?

(A) Cork
(B) Plastic ball
(C) Iron nail
(D) Dry leaf

Correct Answer: C

Explanation:

Iron nail has greater density than water.

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Question (6)

QN002116

A ship made of iron floats mainly because —

(A) Iron becomes lighter in water
(B) The shape allows enough upthrust
(C) Water loses density
(D) Gravity stops acting

Correct Answer: B

Explanation:

The hollow shape increases upthrust.

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Question (7)

QN002117

Which statement correctly explains sinking?

(A) Object’s weight is greater than upthrust
(B) Upthrust is greater than weight
(C) No gravity acts
(D) Liquid disappears

Correct Answer: A

Explanation:

Objects sink when weight exceeds upthrust.

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Question (8)

QN002118

A stone sinks in water because —

(A) Water has no upthrust
(B) The stone’s weight exceeds the upthrust
(C) Gravity does not act on water
(D) The stone absorbs water instantly

Correct Answer: B

Explanation:

Upthrust is smaller than the stone’s weight.

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Question (9)

QN002119

Which of the following floats on water?

(A) Steel spoon
(B) Glass marble
(C) Thermocol sheet
(D) Iron bolt

Correct Answer: C

Explanation:

Thermocol has lower density than water.

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Question (10)

QN002120

When an object is immersed in water, the water exerts force in —

(A) Downward direction only
(B) Upward direction only
(C) Horizontal direction only
(D) No direction

Correct Answer: B

Explanation:

Liquids exert upward buoyant force.

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Question (1)

An object floats in water when —

Explanation:

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Question (2)

Which force helps objects float in water?

Explanation:

Link:

Question (3)

A wooden block floats on water because —

Explanation:

Link:

Question (4)

The upward force exerted by a liquid on an immersed object is called —

Explanation:

Link:

Question (5)

Which of the following objects is most likely to sink in water?

Explanation:

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Question (6)

A ship made of iron floats mainly because —

Explanation:

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Question (7)

Which statement correctly explains sinking?

Explanation:

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Question (8)

A stone sinks in water because —

Explanation:

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Question (9)

Which of the following floats on water?

Explanation:

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Question (10)

When an object is immersed in water, the water exerts force in —

Explanation:

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