ECAT Pre Computer Science Chapter 3 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 3 Motion and Force

Try The MCQ's Test For ECAT Physics Chapter 3 Motion and Force

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ECAT Physics Chapter 3 Motion and Force

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Question # 1

Bodies failing freely under gravity provide good example of motion under

Question # 2

The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12. If the resultant is at 90° with the force of the smaller magnitude, then their magnitudes are

Question # 3

A man fires a bullet of mass 200 g at a speed of 5 m/s. The gun is of one kg mass. By what velocity the gun rebounds backwards?

Question # 4

Graphs which are used to illustrate the variation of velocity of an object with time are called

Question # 5

The magnitude of the force producing an acceleration of 10 m/sec2in a body of mass 500 grams is:

Question # 6

A body of mass 5 kg is acted upon by a constant force of 20 n for 7 seconds. The total change in momentum will be:

Question # 7

Slope of velocity time graph represents:

Question # 8

A snooker ball moving with velocity V collides head on with another snooker ball of same mass at rest. If the collision is elastic, the velocity of second snooker ball is

Question # 9

A body of mass 5 kg is acted upon by a total change n momentum will be:

Question # 10

Range of a projectile is R, when the angle of projection is 30° . Then, the value of the other angle of projection for the same range, is

Question # 11

If speed of electron is 5 x 105m/s. How long does it take one electron to transverse 1 m?

Question # 12

The consumption source if energy is:

Question # 13

A body is thrown from a height h with speed u, it hits the ground with speed V

Question # 14

When the total displacement is divided by total time taken, we get:

Question # 15

A typical rocket consists of fuel

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Sr.# Question Answer
1 A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of
A. 3 s
B. 5 s
C. 7 s
D. 9 s
2 Find the total displacement of a body in 8 seconds starting from rest with an acceleration of 20 cm/s2
A. 0.064 m
B. 640 cm
C. 64 cm
D. 64 m
3 The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12. If the resultant is at 90° with the force of the smaller magnitude, then their magnitudes are
A. 3, 15
B. 4, 14
C. 5, 13
D. 6, 12
4 Work done along a closed path in a gravitational field is:
A. Maximum
B. Minimum
C. Zero
D. Unity
5 A lift is descending at a constant speed V. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be
A. Zero
B. g
C. -g
D. V + g
6 The direction of the acceleration is the same as that of
A. speed
B. velocity
C. both of them
D. none of them
7 The path followed by the projectile is known as:
A. Cycle
B. Hyperbola
C. Trajectory
D. Route
8 A person is sitting in a traveling train and facing the engine. He tosses up a coin and the coin falls behind him. It can be concluded that the train is
A. Moving forward and gaining speed
B. Moving forward and losing speed
C. Moving forward with uniform speed
D. Moving backward with uniform speed
9 A mass of 5kg moves with an acceleration of 10m s-2force applied is
A. 10N
B. 50N
C. 2N
D. 20N
10 According to the law of conservation of linear momentum, the total linear momentum of an isolated system
A. increases
B. decreases with time
C. remains constant
D. none of them

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