Default Title

Question (1)

QN006232

The Work-Energy Theorem states that:

(A) Work done is always zero
(B) Energy can neither be created nor destroyed
(C) Work done on an object equals change in its kinetic energy
(D) Power equals work done per second

Correct Answer: C

Explanation:

Work done by net force equals change in kinetic energy

Link:

Report Error

Question (2)

QN006233

If positive work is done on a body, its kinetic energy generally:

(A) Decreases
(B) Becomes zero
(C) Increases
(D) Remains unchanged

Correct Answer: C

Explanation:

Positive work increases kinetic energy

Link:

Report Error

Question (3)

QN006234

A force does 200 J of work on a stationary object. The gain in kinetic energy is:

(A) 0 J
(B) 100 J
(C) 200 J
(D) –200 J

Correct Answer: C

Explanation:

Gain in kinetic energy equals work done

Link:

Report Error

Question (4)

QN006235

A moving body is brought to rest by friction. The work done by friction is:

(A) Positive
(B) Zero
(C) Equal to gain in kinetic energy
(D) Equal to loss in kinetic energy

Correct Answer: D

Explanation:

Friction reduces kinetic energy

Link:

Report Error

Question (5)

QN006236

The kinetic energy of an object depends on:

(A) Mass only
(B) Velocity only
(C) Both mass and velocity
(D) Shape only

Correct Answer: C

Explanation:

KE = ½mv²

Link:

Report Error

Question (6)

QN006237

The formula for kinetic energy is:

(A) mv
(B) ½mv²
(C) mgh
(D) Fd

Correct Answer: B

Explanation:

Standard formula of kinetic energy

Link:

Report Error

Question (7)

QN006238

A body of mass 2 kg moves with velocity 3 m/s. Its kinetic energy is:

(A) 3 J
(B) 6 J
(C) 9 J
(D) 18 J

Correct Answer: C

Explanation:

KE = ½ × 2 × 3² = 9 J

Link:

Report Error

Question (8)

QN006239

A 4 kg object moving at 5 m/s has kinetic energy:

(A) 20 J
(B) 25 J
(C) 50 J
(D) 100 J

Correct Answer: C

Explanation:

KE = ½ × 4 × 25 = 50 J

Link:

Report Error

Question (9)

QN006240

If velocity of a body doubles, its kinetic energy becomes:

(A) Double
(B) Half
(C) Four times
(D) Eight times

Correct Answer: C

Explanation:

Kinetic energy depends on square of velocity

Link:

Report Error

Question (10)

QN006241

If mass of a moving body becomes three times while velocity remains same, kinetic energy becomes:

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

Correct Answer: B

Explanation:

KE is directly proportional to mass

Link:

Report Error

Question (1)

The Work-Energy Theorem states that:

Explanation:

Link:

Question (2)

If positive work is done on a body, its kinetic energy generally:

Explanation:

Link:

Question (3)

A force does 200 J of work on a stationary object. The gain in kinetic energy is:

Explanation:

Link:

Question (4)

A moving body is brought to rest by friction. The work done by friction is:

Explanation:

Link:

Question (5)

The kinetic energy of an object depends on:

Explanation:

Link:

Question (6)

The formula for kinetic energy is:

Explanation:

Link:

Question (7)

A body of mass 2 kg moves with velocity 3 m/s. Its kinetic energy is:

Explanation:

Link:

Question (8)

A 4 kg object moving at 5 m/s has kinetic energy:

Explanation:

Link:

Question (9)

If velocity of a body doubles, its kinetic energy becomes:

Explanation:

Link:

Question (10)

If mass of a moving body becomes three times while velocity remains same, kinetic energy becomes:

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY