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MCQ on Dynamics. We covered all the MCQ on Dynamics in this post for free so that you can practice well for the competitive exam that covers the dynamics syllabus.
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Dynamics MCQ for School Students
The time taken for four full rotations by an object is 4T seconds, and T seconds for one full rotation. The object exhibits
a. circular motion
b. elliptical motion
c. uniform circular motion
d. none of these
Option c – uniform circular motion
In uniform circular motion, the time period (T) of the object remains
a. different for each rotation
b. constant for every rotation
c. unpredictable
d. none of these
Option b – constant for every rotation
The angle that the radius vector sweeps in a given time is referred to as
a. angular velocity
b. angular displacement
c. angular acceleration
d. angular speed
Option b – angular displacement
The SI unit used to measure angular displacement is
a. degrees
b. minutes
c. seconds
d. radians
Option d – radians
The rate at which angular displacement changes is known as
a. angular velocity
b. angular momentum
c. velocity
d. none of these
Option a – angular velocity
The time required for a rotating object to complete one revolution is known as its
a. period of time
b. frequency
c. escape time
d. none of these
Option a – period of time
The Earth’s revolution has a time period of
a. 1 day
b. 1 year
c. 1 month
d. 1 week
Option b – 1 year
The moon completes one revolution in
a. 27.3 seconds
b. 27.3 hours
c. 27.3 × 24 × 60 × 60 seconds
d. 27.3 × 24 × 60 seconds
Option c – 27.3 × 24 × 60 × 60 seconds
A particle moving in a circle tends to follow a straight-line path due to
a. inertia of rest
b. inertia of motion
c. inertia of direction
d. none of these
Option c – inertia of direction
The force that makes a body travel in a circular path is called centripetal force because
a. it acts perpendicular to the direction of linear motion
b. it is directed inward along the radius
c. it always acts perpendicularly to the object’s motion on the path
d. all of these
Option d – all of these
The force that keeps Earth in orbit around the Sun is
a. the gravitational attraction between Earth and the Moon
b. the gravitational pull between Earth and the Sun
c. the gravitational force between the Moon and the Sun
d. all of these
Option b – the gravitational pull between Earth and the Sun
A satellite orbits a planet due to the
a. gravitational force between the Sun and the planet
b. gravitational force between the Sun and the satellite
c. gravitational force between the planet and the satellite
d. none of these
Option c – gravitational force between the planet and the satellite
When a stone tied to a string is spun, the centripetal force is provided by
a. the thumb
b. the finger holding the string
c. the little finger
d. any finger
Option b – the finger holding the string
When a block is moved inward from the edge of a spinning disk and returns to the rim, it’s due to
a. a force pushing it outward
b. centrifugal force
c. centripetal force
d. both a and b
Option d – both a and b
In an atom, the force responsible for the electron’s circular motion around the nucleus is
a. electrostatic attraction between the nucleus and the electron
b. electrical current force
c. magnetic interaction
d. all of these
Option a – electrostatic attraction between the nucleus and the electron
A block stays at the edge of a rotating disk because of
a. centripetal force from the rim
b. centrifugal force pulling it inward
c. a balance between centripetal and centrifugal forces
d. all of these
Option c – a balance between centripetal and centrifugal forces
A reference frame where Newton’s laws are valid is called
a. inertial frame of reference
b. non-inertial frame of reference
c. rotating reference frame
d. all of these
Option a – inertial frame of reference
Two trains moving at the same speed in the same direction appear motionless to each other. The frame of reference of one train is
a. one where Newton’s laws are not valid
b. one where Newton’s laws are valid
c. governed by Newton’s law of gravitation
d. not governed by Newton’s law of gravitation
Option b – one where Newton’s laws are valid
In a non-inertial frame, centrifugal force is considered a
a. pseudo force
b. real force
c. fictitious force
d. none of these
Option b – real force
In an inertial frame, centrifugal force is seen as a
a. real force
b. fictitious force
c. both
d. none
Option b – fictitious force
In circular motion, the force acting on the body ensures that
a. only radius remains unchanged while velocity varies
b. direction and radius both change, but velocity does not
c. direction of velocity changes, radius and speed remain constant
d. velocity changes but direction and radius stay fixed
Option c – direction of velocity changes, radius and speed remain constant
The direction of velocity for an object moving in a circular path is
a. along the tangent to the circle at that point
b. perpendicular to the tangent at that point
c. towards the center
d. none of these
Option a – along the tangent to the circle at that point
The physical quantity that causes a change in a body’s motion is
a. inertia
b. force
c. mass
d. weight
Option b – force
The branch of physics that deals with the motion of bodies under force is
a. dynamics
b. kinematics
c. force
d. stress
Option a – dynamics
Which of the following initiates motion in an object?
a. inertia
b. mass
c. force
d. stress
Option c – force
When a body moves along a straight path, its motion is termed
a. translatory motion
b. rotatory motion
c. oscillatory motion
d. periodic motion
Option a – translatory motion
At any point on a circular path, the motion of the object is
a. linear motion
b. rotatory motion
c. oscillatory motion
d. none of these
Option a – linear motion
The swinging of a pendulum in a clock demonstrates
a. linear motion
b. rotatory motion
c. oscillatory motion
d. none of these
Option c – oscillatory motion
The motion of a windmill is an example of
a. vibratory motion
b. translatory motion
c. rotatory motion
d. none of these
Option c – rotatory motion
In rotatory motion, every particle of the body follows
a. rotatory motion
b. translatory motion
c. vibratory motion
d. none of these
Option a – rotatory motion
Circular motion is considered a specific type of
a. translatory motion
b. oscillatory motion
c. circular motion
d. none of these
Option c – circular motion
We covered all the mcq on dynamics in this post for free so that you can practice well for the exam.
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