ECAT Pre Engineering Physics Chapter 3 MCQ Test With Answer

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

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Physics ECAT Pre Engineering Chapter 3 Motion and Force

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Question # 1

One newton is a force that produces an acceleration of 0.5 m/sec2in a body of mass:

Question # 2

If the slope of the velocity-time graph increases at constant rate with time, then the body is said to have

Question # 3

A body is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about

Question # 4

Acceleration in a body is always produced in the directin of:

Question # 5

The area under line velocity-time graph is numerically equal to the

Question # 6

When a body is moving on a surface, the force of friction is called

Question # 7

The velocity given to a body to go out of the influence of earth's gravity is known as:

Question # 8

If d is the displacement of the body in time t, then its average velocity will be

Question # 9

When a shall explodes a mid-air, the total momentum of its fragments is

Question # 10

If two bodies of equal masses moving in the same direction collide elastically, then their velocities.

Question # 11

An aircraft is moving with a velocity of 300 ms-1. If all the forces acting on it are balanced, then

Question # 12

Bodies which falls freely under gravity provides good example of motion under:

Question # 13

When the surfaces are coated with a lubricant, then they

Question # 14

When two protons are brought closer potential energy of both of them:

Question # 15

A ball is dropped vertically down and it takes time t to reach the ground. At time t/2

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ECAT Physics Chapter 3 Important MCQ's

Sr.# Question Answer
1 An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is:
A. 100 m/sec
B. 140 m/sec
C. 1960 m/sec
D. 196 m/sec
2 The path (or trajectory) described by a projectile is
A. a parabola
B. a hyperbola
C. a circle
D. a straight line
3 A certain force gives an acceleration of 2 m/sec2 to a body if mass 5 kg. The same force would give a 29 kg object an acceleration of:
A. 0.5 m/sec2
B. 5 m/sec2
C. 1.5 m/sec2
D. 9.8 m/sec2
4 Slope of velocity-time graph represents:
A. Acceleration
B. Speed
C. Torque
D. Work
5 A lift is moving up with acceleration equal to 1/5 of that due to gravity. The apparent weight of a 60 kg man standing in lift is
A. 60 kg wt
B. 72 kg wt
C. 48 kg wt
D. Zero
6 Flight of rocket in the space is an example of
A. Newton's first law
B. Newton's third law
C. Newton's second law
D. all of them
7 The SI units of momentum is
A. kg m s-2
B. kg ms
C. kg m s2
D. N-s
8 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
9 Essential characteristic of equilibrium is
A. Momentum equal to zero
B. Acceleration equal to zero
C. Kinetic energy equal to zero
D. Velocity equal to zero
10 Laws of motion are not valid in a system which is
A. inertial
B. non-interial
C. at rest
D. moving with uniform velocity

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