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Question (41)

QN0026267

A body accelerates when:

(A) Net force is zero
(B) Balanced forces act
(C) Unbalanced force acts
(D) Friction disappears completely

Correct Answer: C

Explanation:

Unbalanced force changes velocity.

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Question (42)

QN0026268

A force of 95 N acts forward while friction of 45 N acts backward. Resultant force is:

(A) 140 N forward
(B) 50 N forward
(C) 50 N backward
(D) 140 N backward

Correct Answer: B

Explanation:

Net force = 95 − 45 = 50 N forward.

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Question (43)

QN0026269

Which law explains why passengers move backward when a bus starts suddenly?

(A) Newton’s First Law
(B) Newton’s Second Law
(C) Newton’s Third Law
(D) Universal Gravitation

Correct Answer: A

Explanation:

Inertia of rest causes passengers to move backward.

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Question (44)

QN0026270

The action and reaction forces in Newton’s Third Law act on:

(A) Same object
(B) Different objects
(C) Same direction
(D) Same point only

Correct Answer: B

Explanation:

Action and reaction always act on different bodies.

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Question (45)

QN0026271

A force of 250 N acts on a crate while friction of 180 N opposes motion. Net force equals:

(A) 430 N forward
(B) 70 N forward
(C) 70 N backward
(D) 430 N backward

Correct Answer: B

Explanation:

Net force = 250 − 180 = 70 N forward.

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Question (46)

QN0026272

Which type of friction acts between air and moving vehicles?

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

Correct Answer: C

Explanation:

Air resistance is fluid friction.

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Question (47)

QN0026273

A body moving in a circular path continuously changes due to:

(A) Absence of force
(B) Change in direction of motion
(C) Zero acceleration
(D) Zero momentum

Correct Answer: B

Explanation:

Circular motion involves continuous change in direction.

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Question (48)

QN0026274

A force of 36 N northward and 16 N southward act simultaneously. Resultant force is:

(A) 52 N northward
(B) 20 N northward
(C) 20 N southward
(D) 52 N southward

Correct Answer: B

Explanation:

Net force = 36 − 16 = 20 N northward.

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Question (49)

QN0026275

Walking is possible because of:

(A) Gravity only
(B) Friction between foot and ground
(C) Magnetic attraction
(D) Buoyancy

Correct Answer: B

Explanation:

Friction provides grip for walking.

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Question (50)

QN0026276

Which statement correctly describes force?

(A) Force has only magnitude
(B) Force has only direction
(C) Force has magnitude and direction
(D) Force has neither magnitude nor direction

Correct Answer: C

Explanation:

Force is a vector quantity having magnitude and direction.

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Question (41)

A body accelerates when:

Explanation:

Link:

Question (42)

A force of 95 N acts forward while friction of 45 N acts backward. Resultant force is:

Explanation:

Link:

Question (43)

Which law explains why passengers move backward when a bus starts suddenly?

Explanation:

Link:

Question (44)

The action and reaction forces in Newton’s Third Law act on:

Explanation:

Link:

Question (45)

A force of 250 N acts on a crate while friction of 180 N opposes motion. Net force equals:

Explanation:

Link:

Question (46)

Which type of friction acts between air and moving vehicles?

Explanation:

Link:

Question (47)

A body moving in a circular path continuously changes due to:

Explanation:

Link:

Question (48)

A force of 36 N northward and 16 N southward act simultaneously. Resultant force is:

Explanation:

Link:

Question (49)

Walking is possible because of:

Explanation:

Link:

Question (50)

Which statement correctly describes force?

Explanation:

Link:

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