Default Title

Question (21)

QN006202

A machine lifts three bags together to the same height using three times larger force. Compared to lifting one bag, work done is:

(A) Same
(B) Three times
(C) Nine times
(D) Half

Correct Answer: B

Explanation:

W = F × s, force becomes three times

Link:

Report Error

Question (22)

QN006203

A constant force of 45 N produces 225 J of work. The displacement is:

(A) 5 m
(B) 180 m
(C) 270 m
(D) 10 m

Correct Answer: A

Explanation:

s = 225 ÷ 45 = 5 m

Link:

Report Error

Question (23)

QN006204

A child drags a toy cart with a force of 15 N through 12 m. Calculate the work done.

(A) 27 J
(B) 180 J
(C) 3 J
(D) 150 J

Correct Answer: B

Explanation:

W = 15 × 12 = 180 J

Link:

Report Error

Question (24)

QN006205

A force of 300 N acts on an object but produces no work. Which condition is possible?

(A) Object moved vertically
(B) Displacement is zero
(C) Force doubled
(D) Object accelerated

Correct Answer: B

Explanation:

Zero displacement gives zero work

Link:

Report Error

Question (25)

QN006206

In lifting a bucket from a well, the work done by gravitational force on the bucket is:

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

Correct Answer: C

Explanation:

Gravity acts opposite to displacement

Link:

Report Error

Question (26)

QN006207

A 10 N force acts on a body for a displacement of 0.5 m in the same direction. Work done is:

(A) 20 J
(B) 5 J
(C) 0.2 J
(D) 10 J

Correct Answer: B

Explanation:

W = 10 × 0.5 = 5 J

Link:

Report Error

Question (27)

QN006208

Which of the following situations involves zero work done?

(A) Pulling a bucket upward
(B) Pushing a moving trolley
(C) Carrying a load on the head along a level road
(D) Kicking a football

Correct Answer: C

Explanation:

Force is perpendicular to displacement

Link:

Report Error

Question (28)

QN006209

A labourer lifts a 200 N cement bag by 2 m. Work done is:

(A) 100 J
(B) 400 J
(C) 202 J
(D) 40 J

Correct Answer: B

Explanation:

W = 200 × 2 = 400 J

Link:

Report Error

Question (29)

QN006210

A force of 90 N moves an object by 7 m in its direction. The work done is:

(A) 630 J
(B) 97 J
(C) 12.8 J
(D) 830 J

Correct Answer: A

Explanation:

W = 90 × 7 = 630 J

Link:

Report Error

Question (30)

QN006211

Which quantity is represented by the area under a force-displacement graph?

(A) Velocity
(B) Momentum
(C) Work done
(D) Acceleration

Correct Answer: C

Explanation:

Area under F-s graph gives work done

Link:

Report Error

Question (21)

A machine lifts three bags together to the same height using three times larger force. Compared to lifting one bag, work done is:

Explanation:

Link:

Question (22)

A constant force of 45 N produces 225 J of work. The displacement is:

Explanation:

Link:

Question (23)

A child drags a toy cart with a force of 15 N through 12 m. Calculate the work done.

Explanation:

Link:

Question (24)

A force of 300 N acts on an object but produces no work. Which condition is possible?

Explanation:

Link:

Question (25)

In lifting a bucket from a well, the work done by gravitational force on the bucket is:

Explanation:

Link:

Question (26)

A 10 N force acts on a body for a displacement of 0.5 m in the same direction. Work done is:

Explanation:

Link:

Question (27)

Which of the following situations involves zero work done?

Explanation:

Link:

Question (28)

A labourer lifts a 200 N cement bag by 2 m. Work done is:

Explanation:

Link:

Question (29)

A force of 90 N moves an object by 7 m in its direction. The work done is:

Explanation:

Link:

Question (30)

Which quantity is represented by the area under a force-displacement graph?

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY