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Question (31)

QN003681

Which statement correctly defines Newton’s Third Law?

(A) Force equals mass × acceleration
(B) Objects resist change in motion
(C) Every action has equal and opposite reaction
(D) Momentum equals mass × velocity

Correct Answer: C

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Question (32)

QN003682

A fish swims forward by:

(A) Pulling water forward
(B) Pushing water backward
(C) Increasing gravity
(D) Reducing friction completely

Correct Answer: B

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Question (33)

QN003683

A person standing on roller skates pushes another skater forward. He himself moves backward because of:

(A) Friction only
(B) Newton’s Third Law
(C) Magnetic force
(D) Pressure difference

Correct Answer: B

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Question (34)

QN003684

If Earth pulls a body downward with force 20 N, the body pulls Earth upward with:

(A) 10 N
(B) 20 N
(C) 40 N
(D) 0 N

Correct Answer: B

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Question (35)

QN003685

Which of the following is not an action-reaction pair?

(A) Foot pushes ground and ground pushes foot
(B) Gun pushes bullet and bullet pushes gun
(C) Weight and normal reaction on same object
(D) Oar pushes water and water pushes boat

Correct Answer: C

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Question (36)

QN003686

Birds fly because wings:

(A) Push air downward
(B) Pull gravity upward
(C) Reduce inertia
(D) Increase density

Correct Answer: A

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Question (37)

QN003687

The reaction force to action of tyre on road is:

(A) Road pushing tyre forward
(B) Gravity on tyre
(C) Friction inside tyre
(D) Air resistance

Correct Answer: A

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Question (38)

QN003688

A wall exerts 150 N reaction force when pushed. The action force on wall is:

(A) 75 N
(B) 150 N
(C) 300 N
(D) 0 N

Correct Answer: B

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Question (39)

QN003689

Which statement about action and reaction is correct?

(A) They act on same object
(B) They have same direction
(C) They occur simultaneously
(D) One exists without other

Correct Answer: C

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Question (40)

QN003690

A rocket pushes gases downward with force 5000 N. Upward thrust on rocket equals:

(A) 2500 N
(B) 5000 N
(C) 10000 N
(D) 0 N

Correct Answer: B

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Question (31)

Which statement correctly defines Newton’s Third Law?

Explanation:

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Question (32)

A fish swims forward by:

Explanation:

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Question (33)

A person standing on roller skates pushes another skater forward. He himself moves backward because of:

Explanation:

Link:

Question (34)

If Earth pulls a body downward with force 20 N, the body pulls Earth upward with:

Explanation:

Link:

Question (35)

Which of the following is not an action-reaction pair?

Explanation:

Link:

Question (36)

Birds fly because wings:

Explanation:

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Question (37)

The reaction force to action of tyre on road is:

Explanation:

Link:

Question (38)

A wall exerts 150 N reaction force when pushed. The action force on wall is:

Explanation:

Link:

Question (39)

Which statement about action and reaction is correct?

Explanation:

Link:

Question (40)

A rocket pushes gases downward with force 5000 N. Upward thrust on rocket equals:

Explanation:

Link:

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