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Question (31)

QN003531

Friction acting on an object moving through water is called:

(A) Sliding friction
(B) Rolling friction
(C) Fluid friction
(D) Static friction

Correct Answer: C

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Question (32)

QN003532

A force of 75 N pulls a suitcase while friction of 40 N opposes it. Net force is:

(A) 115 N forward
(B) 35 N forward
(C) 35 N backward
(D) 115 N backward

Correct Answer: B

Explanation:

75 − 40 = 35 N forward.

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Question (33)

QN003533

Which statement correctly defines friction?

(A) Force increasing motion
(B) Force opposing motion
(C) Force causing gravity
(D) Force acting upward only

Correct Answer: B

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Question (34)

QN003534

Why do brake pads stop vehicles?

(A) They reduce friction
(B) They increase friction
(C) They reduce gravity
(D) They increase speed

Correct Answer: B

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Question (35)

QN003535

Which type of friction is smallest?

(A) Static friction
(B) Sliding friction
(C) Rolling friction
(D) Fluid friction

Correct Answer: C

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Question (36)

QN003536

Friction can be harmful because it:

(A) Helps walking
(B) Produces wear and tear
(C) Allows writing
(D) Helps vehicles move

Correct Answer: B

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Question (37)

QN003537

A force of 150 N moves a trolley while friction of 100 N acts opposite. Net force is:

(A) 250 N forward
(B) 50 N forward
(C) 50 N backward
(D) 250 N backward

Correct Answer: B

Explanation:

150 − 100 = 50 N forward.

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Question (38)

QN003538

Why are machine parts polished?

(A) To increase friction
(B) To reduce friction
(C) To increase mass
(D) To increase pressure

Correct Answer: B

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Question (39)

QN003539

Which statement about friction is true?

(A) It always increases motion
(B) It acts only on stationary objects
(C) It opposes relative motion
(D) It acts only downward

Correct Answer: C

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Question (40)

QN003540

Friction between shoe soles and ground helps us:

(A) Float
(B) Fly
(C) Walk
(D) Swim

Correct Answer: C

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Question (31)

Friction acting on an object moving through water is called:

Explanation:

Link:

Question (32)

A force of 75 N pulls a suitcase while friction of 40 N opposes it. Net force is:

Explanation:

Link:

Question (33)

Which statement correctly defines friction?

Explanation:

Link:

Question (34)

Why do brake pads stop vehicles?

Explanation:

Link:

Question (35)

Which type of friction is smallest?

Explanation:

Link:

Question (36)

Friction can be harmful because it:

Explanation:

Link:

Question (37)

A force of 150 N moves a trolley while friction of 100 N acts opposite. Net force is:

Explanation:

Link:

Question (38)

Why are machine parts polished?

Explanation:

Link:

Question (39)

Which statement about friction is true?

Explanation:

Link:

Question (40)

Friction between shoe soles and ground helps us:

Explanation:

Link:

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