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Substantive motion UPSC. We covered all the Substantive motion UPSC in this post for free so that you can practice well for the exam.
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Mock test on Substantive motion for UPSC Students
A person is standing on a smooth, frictionless horizontal surface. How can they move a certain distance across it?
(a) By sneezing
(b) By jumping
(c) By running
(d) By rolling
Option d – By rolling
Assertion (A): Newton’s Third Law of motion applies only when objects are in motion. Reason (R): Newton’s Third Law holds true for all types of forces such as gravitational, electric, and magnetic forces.
(a) Both A and R are correct, and R correctly explains A
(b) Both A and R are correct, but R does not explain A correctly
(c) A is correct, but R is incorrect
(d) A is incorrect, but R is correct
Option d – A is incorrect, but R is correct
The conservation of momentum during a collision between particles can be explained using
(a) Newton’s First Law of motion
(b) Newton’s Second Law of motion
(c) Both Newton’s Second and Third Laws of motion
(d) Conservation of energy
Option c – Both Newton’s Second and Third Laws of motion
A bullet of Mass 10 g is fired at 20 m/s from a gun of Mass 2 kg. What is the recoil velocity of the gun (in m/s)?
(a) 1
(b) 0.2
(c) 0.1
(d) 2
Option c – 0.1
A jet engine operates on the principle of
(a) Conservation of Mass
(b) Conservation of energy
(c) Conservation of linear momentum
(d) Conservation of angular momentum
Option c – Conservation of linear momentum
Statement I: When a gun is fired, it recoils with much lower velocity than the bullet. Statement II: The recoil velocity is smaller because the gun’s Mass is much greater than that of the bullet. According to the law of conservation of momentum, the total momentum of the system remains constant.
(a) Both statements are correct, and Statement II correctly explains Statement I
(b) Both statements are correct, but Statement II does not explain Statement I
(c) Statement I is correct, but Statement II is incorrect
(d) Statement I is incorrect, but Statement II is correct
Option a – Both statements are correct, and Statement II correctly explains Statement I
The impulse of a force acting on a particle over a certain time interval equals the change in its
(a) force
(b) Momentum
(c) work done
(d) energy
Option b – Momentum
Action and reaction forces
(a) Always act on the same body
(b) Are equal in magnitude
(c) Act in the same direction
(d) Act independently
Option b – Are equal in magnitude
If action and reaction forces acted on the same body
(a) The NET effect would be zero
(b) The body would remain at rest
(c) The body would start moving
(d) Both (a) and (b) are correct
Option a – The NET effect would be zero
Rockets function based on
(a) Newton’s First Law
(b) Newton’s Second Law
(c) Newton’s Third Law
(d) Newton’s Fourth Law
Option c – Newton’s Third Law
A cannon recoils after firing because of
(a) Conservation of energy
(b) Backward thrust from escaping gases
(c) Newton’s Third Law of motion
(d) Newton’s First Law of Motion
Option c – Newton’s Third Law of Motion
The motion of a horse pulling a carriage is an example of
(a) Newton’s Third Law
(b) Ohm’s Law
(c) Archimedes’ Principle
(d) Avogadro’s Law
Option a – Newton’s Third Law
Which of the following does not involve kinetic friction?
(a) Writing
(b) Speaking
(c) Hearing
(d) Walking
Option c – Hearing
When an object slides over a surface, the friction involved is called
(a) Static friction
(b) Dynamic friction
(c) Limiting friction
(d) Rolling friction
Option b – Dynamic friction
The maximum possible value of static friction is known as
(a) Limiting friction
(b) Rolling friction
(c) Normal reaction
(d) Coefficient of friction
Option a – Limiting friction
A body experiences two unequal forces in opposite directions, but these forces are not collinear. The body will exhibit
(a) Only rotational motion
(b) Only translational motion
(c) Neither rotational nor translational motion
(d) Both rotational and translational motion
Option d – Both rotational and translational motion
When NET torque is zero, which quantity remains constant?
(a) force
(b) Angular momentum
(c) Linear momentum
(d) Acceleration
Option b – Angular momentum
To open a door with minimal effort, the handle should be placed
(a) Near the hinges
(b) Far from the midpoint, opposite to the hinges
(c) At the midpoint
(d) None of these
Option b – Far from the midpoint, opposite to the hinges
The moment of inertia of a body is independent of
(a) Axis of rotation
(b) Angular velocity
(c) Shape of the Mass
(d) Distribution of Mass
Option b – Angular velocity
A Solid disc and a Solid sphere have the same Mass and radius. Which has the greater moment of inertia about its center?
(a) The disc
(b) The sphere
(c) Both are equal
(d) Cannot be determined with given data
Option a – The disc
The apparent weight of a person in a lift is less than their actual weight when
(a) The lift is accelerating upward
(b) The lift is moving downward at uniform speed
(c) The lift is moving upward at uniform speed
(d) The lift is accelerating downward
Option b – The lift is moving downward at uniform speed
A 70 kg man is descending in a lift. If the lift cable breaks suddenly, his weight would be
(a) 70 kg
(b) 35 kg
(c) 140 kg
(d) Zero
Option d – Zero
To avoid slipping while walking on ice, one should take shorter steps because
(a) Ice has high friction
(b) The normal force is large
(c) Ice has very low friction
(d) The normal force is small
Option c – Ice has very low friction
“For every action, there is an equal and opposite reaction” — this law was proposed by
(a) Newton
(b) Albert Einstein
(c) Bohr
(d) Haldane
Option a – Newton
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