MDCAT Physics Chapter 2 online mcq test with answers for chapter 2 (Work and Energy)

Question # 1

The centre of gravity of a triangular plate is at

On end of the plate A
The midpoint of any side of the plate B
The midpoint of any side of the plate C
The midpoint of any side of the plate D

Question # 2

Two railway trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and v respectively. These trucks collide and stick together. What is the speed of the trucks after the collision?

v/4 A
v/2 B
v C
5v/4 D

Question # 3

The angle of projection, at which the range of projectile would become half of its maximum value.

45Degree A
30Degree B
15Degree C
60 Degree D

Question # 4

The angular momentum of a body changes from 30 J-S to 50 J-S in 0.5 sec. The torque acting on it is

40 N-m A
100 N-m B
50 N-m C
150 N-m D

Question # 5

In a one-dimensional elastic collision, the relative velocity of approach before collision is equal to:

Sum of the velocities of the bodies A
e times the relative velocity of separation after collision B
1⁄𝑒 times the relative velocity of separation after collision C
relative velocity of separation after collision D

Question # 6

A body is in translational equilibrium if

P = 0 A
L = 0 B
F = 0 C
 = 0 D

Question # 7

A rigid uniform bar of length 2.4 m is pivoted horizontally at its mid-point, weights are hung from two points of the bar as shown in diagram. To maintain horizontal equilibrium, a couple is applied to the bar: What is the torque and the direction of couple?

40 N m clockwise A
40 N m anti-clockwise B
80 N m clockwise C
80 N m anti-clockwise D

Question # 8

Two 8 N forces act on each end of the beam of length 0.60m. Two forces are parallel and acting opposite to each other, the angle between the force and beam is 60o , what is the torque of the couple exerted on the beam:

2.4 Nm A
4.2 Nm B
4.8 Nm C
9.6 Nm D

Question # 9

. Time rate of change of momentum is equal to

Force A
Impulse B
Velocity C
Both A and C D

Question # 10

A particle executing one dimensional motion, finally comes to rest, what will be the angle between
acceleration and displacement during motion:

0 A
π B
𝜋/2
C
𝜋/4 D

Question # 11

A boy is travelling from Lahore to Karachi with uniform velocity . Its

Speed changes A
Acceleration changes B
Direction of motion changes C
Displacement from origin changes D

Question # 12

Two astronauts in a satellite must have

Same masses A
Same real weights B
Same apparent weights C
None of these D

Question # 13

A body of mass m having an initial velocity v, makes head on elastic collision with a stationary body of mass m. After the collision, the body of mass m comes to rest and only the body having mass M moves. This will happen only when:

m>>M A
m<<M B
) m=M C
m=1M D

Question # 14

The rate of change of momentum of a body falling freely under gravity is equal to its

Impulse A
Kinetic energy B
Pover C
Weight D

Question # 15

The distance covered by a body in time ‘t’ starting from rest is:

1/2 𝑡² A
vt B
𝑎𝑡² C
𝑎𝑡₂ D

Question # 16

Two projectiles ‘A’ and ‘B’ are thrown with same speed but at angle of 40 degree and 50 degree with the horizontal. The horizontal range of ‘A’ will be:

Equal to that of ‘B’ A
Greater than that of ‘B’ B
Less than that of ‘B’ C
4/5times that of ‘B’ D

Question # 17

A monkey is accelerating down a string whose breaking strength is two third of his weight. The minimumacceleration of the monkey should be

1/3g A
g B
2/3 g C
0 m/s2 D

Question # 18

In the absence of air resistance, a stone is thrown from P and follows a parabolic path in which the highest point reached is T. The vertical component of acceleration of stone is:

Zero at T A
Greatest at T B
) Greatest at P C
the same at P as at T D

Question # 19

A rider uses Motorcycle safety helmet that extends the time of collision during accident hence decreasing the

Change of collisio A
Force acting B
Velocity C
Impulse D

Question # 20

select Which one of the following is not performing projectile motion

A gas filled balloon A
) Bullet fired from gun B
A football kicked C
A baseball shot D

Sr.#	Question	Answer
1	The time of flight of a projectile is maximum when angle of projection is:	A. 30 Degree B. 45Degree C. 60Degree D. 90Degree
2	The centre of gravity of a triangular plate is at	A. On end of the plate B. The midpoint of any side of the plate C. The midpoint of any side of the plate D. The midpoint of any side of the plate
3	A rider uses Motorcycle safety helmet that extends the time of collision during accident hence decreasing the	A. Change of collisio B. Force acting C. Velocity D. Impulse
4	A boy is travelling from Lahore to Karachi with uniform velocity . Its	A. Speed changes B. Acceleration changes C. Direction of motion changes D. Displacement from origin changes
5	A machine gun fires ‘n’ bullets per second and the mass of each bullet is m. If v is the speed of each bullet then the force exerted on the machine gun is:	A. mng B. mnv C. mnvg D. mnv/g
6	A monkey is accelerating down a string whose breaking strength is two third of his weight. The minimumacceleration of the monkey should be	A. 1/3g B. g C. 2/3 g D. 0 m/s2
7	The angle of projection, at which the range of projectile would become half of its maximum value.	A. 45Degree B. 30Degree C. 15Degree D. 60 Degree
8	. Time rate of change of momentum is equal to	A. Force B. Impulse C. Velocity D. Both A and C
9	A particle executing one dimensional motion, finally comes to rest, what will be the angle between acceleration and displacement during motion:	A. 0 B. π C. 𝜋/2 D. 𝜋/4
10	The angular momentum of a body changes from 30 J-S to 50 J-S in 0.5 sec. The torque acting on it is	A. 40 N-m B. 100 N-m C. 50 N-m D. 150 N-m

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MDCAT Physics Chapter 2 MCQ Test With Answer for (Motion & Force)

MCQ's Test For MDCAT Physics Chapter 2 Motion & Force Online Test

MDCAT Physics Chapter 2 Motion & Force Online Test