MDCAT Physics Chapter 3 online mcq test with answers for chapter 3 (Rotational and Circular Motion)

Question # 1

A ball is thrown vertically upwards. Neglecting air resistance, which statement is correct?

The kinetic energy of the ball is greatest at the greatest height attained A
The potential energy of the ball increase uniformly with time during the ascent B
By the principle of conservation of momentum. The momentum of the ball is constant throughout its motion C
By the principle of conservation of energy, the total energy of the ball is constant throughout its motion D

Question # 2

3 joules of work is done in 3 seconds, then power is:

6 watt A
3 watt B
18 watt C
1 watt D

Question # 3

The gravity does no work, when the body moves:

Horizontally A
Vertically upwards B
Vertically downward C
At an angle of 45o with horizontal D

Question # 4

. A force "F1" acts on a body through distance "S1" in the direction of motion and does work "W1". Similarly another force "F2" act on same body through distance "S2" but in opposite to the direction of motion and does work "W2". Now if F1 = F2 and S1 = S2 then which statement is correct.

W1 = W2 A
W2< W2 B
W1 > W2 C
W1 = W2= 0 D

Question # 5

A body of mass 3 Kg lies on the surface on the table 2m high. It is moved on the surface by 4m. The change of P.E will be:

Zero A
9.8 J B
19.6 J C
329 J D

Question # 6

When a person lifts a body from ground work done by lifting force is?

Positive A
Negative B
Zero C
Half of positive maximum D

Question # 7

You lift a suit case from the floor and keep it on a table. The work done by you on the suitcase does not depend on

the path taken by the suitcase A
weight of the suitcase B
initial and final position C
None D

Question # 8

The same retarding force is applied to stop a train. The train stops after 80 m. If the speed is doubled, then the Stopping distance will be:

The same A
Doubled B
Halved C
Four times D

Question # 9

When the velocity of a body is doubled:

Its K.E is doubled A
Its P.E is doubled B
Its momentum is doubled C
Its acceleration is doubled D

Question # 10

Which of the following is a unit of energy?

unit A
whatt B
Horse Power C
None of the above D

Question # 11

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 joules, the angle which the force makes with the direction of motion of the body is?

0 Degree A
30 Degree B
60 Degree C
90 Degree D

Question # 12

If the momentum of a body is increased n times, its kinetic energy increases:

n times A
2 n times B
√𝑛 times C
n 2 time D

Question # 13

Which of the following types of force can do no work on the particle on which it acts?

Frictional force A
Gravitational force B
Elastic force C
Centripetal force D

Question # 14

You lift a heavy book from the floor of the room and keep it in the book-shelf having a height 2 m. In this process you take 5 seconds. The work done by you will depend upon:

Mass of the book and time taken A
Weight of the book and height of the book-shelf B
Height of the book-shelf and time taken C
Mass of the book, height of the book-shelf and time taken D

Question # 15

Kinetic energy of a body moving with speed of 10 ms-1 is 30 J. If its speed becomes30 ms-1 then its K.E becomes

10J A
270 J B
90J C
180 J D

Question # 16

Ratio of dimension of K.E and power is:

1:1 A
T:1 B
1:T C
M:J D

Question # 17

If the K.E. of a body is increased by 300%, its momentum will increase by:

100 % A
150 % B
√300% C
175 % D

Question # 18

A person weighing 20 mg walks on a level platform with a speed of 2 ms-1 . The work by the person against the force of gravity is:

Zero A
2J B
60J C
600J D

Question # 19

A body of mass m kg is lifted by a man to a height of one meter in 30 sec. Another man lifts the same mass to the same height in 60 sec. The work done by them are in the ratio

1: 2 A
1: 1 B
2: 1 C
4: 1 D

Question # 20

A man M₁ of mass 80 kg runs up a staircase in 15s. Another man M₂ also of mass 80 kg runs up the same staircase in 20s. The ratio of the power developed by them will be

1 A
4/3 B
16/9 C
none of these D

Sr.#	Question	Answer
1	A man weighing 500 N carries a load of 10 kg to the top of a building in 4 minutes. The work done by the man is 6 × 𝟏𝟎⁴ J. If he carries the same load in 8 minutes, the work done by the man will be:	A. 3 × 10⁴ J B. 6 × 10⁴J C. 9 × 10⁴J D. 12× 10⁴ J
2	A person weighing 20 mg walks on a level platform with a speed of 2 ms-1 . The work by the person against the force of gravity is:	A. Zero B. 2J C. 60J D. 600J
3	Which of the following types of force can do no work on the particle on which it acts?	A. Frictional force B. Gravitational force C. Elastic force D. Centripetal force
4	The energy which an -e acquires when accelerated through a potential difference of 1 volt is called?	A. 1 Joule B. 1 Electron volt C. 1 Erg D. 1 Watt
5	The time taken by an engine of power 10 kW to lift a mass of 200 kg to a heightof 40 m is (g + 10ms2)	A. 2 sec B. 4 sec C. 8 sec D. 16sec
6	. A force "F1" acts on a body through distance "S1" in the direction of motion and does work "W1". Similarly another force "F2" act on same body through distance "S2" but in opposite to the direction of motion and does work "W2". Now if F1 = F2 and S1 = S2 then which statement is correct.	A. W1 = W2 B. W2< W2 C. W1 > W2 D. W1 = W2= 0
7	If the velocity of a body becomes half, the kinetic energy of body will become	A. One fourth B. Double C. Four times D. Half
8	When the velocity of a body is doubled:	A. Its K.E is doubled B. Its P.E is doubled C. Its momentum is doubled D. Its acceleration is doubled
9	A body of mass 3 Kg lies on the surface on the table 2m high. It is moved on the surface by 4m. The change of P.E will be:	A. Zero B. 9.8 J C. 19.6 J D. 329 J
10	The body at rest may have:	A. Energy B. Momentum C. Speed D. Velocity

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MDCAT Physics Chapter 3 MCQ Test With Answer for ( Work ,Energy & Power)

MCQ's Test For MDCAT Physics Chapter 3 Work ,Energy & Power Online Test

MDCAT Physics Chapter 3 Work ,Energy & Power Online Test

A ball is thrown vertically upwards. Neglecting air resistance, which statement is correct?

3 joules of work is done in 3 seconds, then power is:

The gravity does no work, when the body moves:

. A force "F1" acts on a body through distance "S1" in the direction of motion and does work "W1". Similarly another force "F2" act on same body through distance "S2" but in opposite to the direction of motion and does work "W2". Now if F1 = F2 and S1 = S2 then which statement is correct.

A body of mass 3 Kg lies on the surface on the table 2m high. It is moved on the surface by 4m. The change of P.E will be:

When a person lifts a body from ground work done by lifting force is?

You lift a suit case from the floor and keep it on a table. The work done by you on the suitcase does not depend on

The same retarding force is applied to stop a train. The train stops after 80 m. If the speed is doubled, then the Stopping distance will be:

When the velocity of a body is doubled:

Which of the following is a unit of energy?

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 joules, the angle which the force makes with the direction of motion of the body is?

If the momentum of a body is increased n times, its kinetic energy increases:

Which of the following types of force can do no work on the particle on which it acts?

You lift a heavy book from the floor of the room and keep it in the book-shelf having a height 2 m. In this process you take 5 seconds. The work done by you will depend upon:

Kinetic energy of a body moving with speed of 10 ms-1 is 30 J. If its speed becomes30 ms-1 then its K.E becomes

Ratio of dimension of K.E and power is:

If the K.E. of a body is increased by 300%, its momentum will increase by:

A person weighing 20 mg walks on a level platform with a speed of 2 ms-1 . The work by the person against the force of gravity is:

A body of mass m kg is lifted by a man to a height of one meter in 30 sec. Another man lifts the same mass to the same height in 60 sec. The work done by them are in the ratio

A man M1 of mass 80 kg runs up a staircase in 15s. Another man M2 also of mass 80 kg runs up the same staircase in 20s. The ratio of the power developed by them will be

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A man M₁ of mass 80 kg runs up a staircase in 15s. Another man M₂ also of mass 80 kg runs up the same staircase in 20s. The ratio of the power developed by them will be