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Question (1)

QN006182

Work done by a constant force is defined as:

(A) Force × time
(B) Force × acceleration
(C) Force × displacement in the direction of force
(D) Mass × acceleration

Correct Answer: C

Explanation:

Work = Force × displacement in the direction of force

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Question (2)

QN006183

One joule of work is done when:

(A) 1 N force moves an object by 1 cm
(B) 1 N force moves an object by 1 m in its direction
(C) 1 kg mass is lifted by 1 m
(D) 1 N force acts for 1 second

Correct Answer: B

Explanation:

1 J = 1 N × 1 m

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Question (3)

QN006184

A force of 25 N moves an object by 4 m in the same direction. The work done is:

(A) 6.25 J
(B) 21 J
(C) 100 J
(D) 29 J

Correct Answer: C

Explanation:

W = F × s = 25 × 4 = 100 J

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Question (4)

QN006185

A boy pushes a box with a force of 60 N. The box moves 5 m in the direction of force. Work done is:

(A) 12 J
(B) 65 J
(C) 300 J
(D) 600 J

Correct Answer: C

Explanation:

W = 60 × 5 = 300 J

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Question (5)

QN006186

If displacement is zero, the work done by a force is:

(A) Infinite
(B) Positive
(C) Negative
(D) Zero

Correct Answer: D

Explanation:

Work done is zero when displacement is zero

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Question (6)

QN006187

A person pushes a rigid wall with a force of 200 N but the wall does not move. The work done on the wall is:

(A) 0 J
(B) 200 J
(C) 20 J
(D) 400 J

Correct Answer: A

Explanation:

No displacement means zero work done

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Question (7)

QN006188

A girl carries a school bag horizontally on a straight road. The work done by her upward force on the bag is:

(A) Positive
(B) Negative
(C) Zero
(D) Infinite

Correct Answer: C

Explanation:

Force and displacement are perpendicular

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Question (8)

QN006189

When force and displacement are perpendicular, the work done is:

(A) Maximum
(B) Minimum
(C) Zero
(D) Infinite

Correct Answer: C

Explanation:

Perpendicular force does zero work

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Question (9)

QN006190

The SI unit of work is:

(A) Newton
(B) Joule
(C) Watt
(D) Pascal

Correct Answer: B

Explanation:

SI unit of work is joule

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Question (10)

QN006191

Work is a:

(A) Vector quantity
(B) Scalar quantity
(C) Both scalar and vector
(D) Tensor quantity

Correct Answer: B

Explanation:

Work has magnitude only

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Question (1)

Work done by a constant force is defined as:

Explanation:

Link:

Question (2)

One joule of work is done when:

Explanation:

Link:

Question (3)

A force of 25 N moves an object by 4 m in the same direction. The work done is:

Explanation:

Link:

Question (4)

A boy pushes a box with a force of 60 N. The box moves 5 m in the direction of force. Work done is:

Explanation:

Link:

Question (5)

If displacement is zero, the work done by a force is:

Explanation:

Link:

Question (6)

A person pushes a rigid wall with a force of 200 N but the wall does not move. The work done on the wall is:

Explanation:

Link:

Question (7)

A girl carries a school bag horizontally on a straight road. The work done by her upward force on the bag is:

Explanation:

Link:

Question (8)

When force and displacement are perpendicular, the work done is:

Explanation:

Link:

Question (9)

The SI unit of work is:

Explanation:

Link:

Question (10)

Work is a:

Explanation:

Link:

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