Force and Laws of Motion Class 9 MCQ Online Test. We covered all the Force and Laws of Motion Class 9 MCQ Online Test in this post for free so that you can practice well for the exam.
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Mock Test on Force and Laws of Motion for Class 9 Students
Assertion (A) A body having non-zero acceleration can have a constant velocity. Reason (R) Acceleration is the rate of change of velocity. Codes
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Option d – A is false, but R is true
In the equation of motion v = u + at, u represents ……….
(a) initial velocity
(b) final velocity
(c) kinetic energy
(d) potential energy
Option a – initial velocity
The first equation of motion gives the relation between
(a) position and time
(b) velocity and time
(c) position and velocity
(d) velocity and acceleration
Option b – velocity and time
A racing car accelerates on a straight line from rest to a speed of 50 m/s in 25 s. Assuming uniform acceleration throughout, the distance covered in this will be
(a) 625 m
(b) 1250 m
(c) 2500 m
(d) 50 m
Option a – 625 m
The second equation of motion gives the relation between
(a) velocity and time.
(b) position and time.
(c) position and velocity.
(d) velocity and acceleration.
Option b – position and time
If an object moves at a non-zero constant acceleration for a certain interval of time, then the distance it covers in that time
(a) depends on its initial velocity.
(b) is independent of its initial velocity.
(c) increases linearly with time.
(d) depends on its initial displacement.
Option a – depends on its initial velocity
A ball is thrown upwards and it returns to the ground describing a parabolic path. Which of the following remains constant?
(a) the kinetic energy of the ball.
(b) speed of the ball.
(c) The horizontal component of velocity.
(d) The vertical component of velocity.
Option c – The horizontal component of velocity
A ball P is dropped vertically and another ball Q is thrown horizontally with the same velocities from the same height and at the same time. If air resistance is neglected, then
(a) the ball Preaches the ground first.
(b) ball Q reaches the ground first.
(c) both reach the ground at the same time.
(d) the respective masses of the two balls will decide the time.
Option c – both reach the ground at the same time
Going 50 m to the South of her house, Radhika turns left and goes another 20 m. Then turning to the North, she goes 30 m and then starts walking to her house. In which direction is she walking now?
(a) North
(b) South-East
(c) North-West
(d) West
Option c – North-West
The angle at which a cricket ball should be hit to travel maximum horizontal distance is
(a) 60° with horizontal.
(b) 45° with horizontal.
(c) 30° with horizontal.
(d) 15° with horizontal.
Option b – 45° with horizontal
Which one of the following statements is not correct?
(a) If the velocity and acceleration have opposite signs, then the object is slowing down.
(b) If the velocity is zero at an instant, then the acceleration should also be zero at that instant.
(c) If the velocity is zero for a time interval, then the acceleration is zero at any instant within the time interval.
(d) If the position and velocity have opposite signs, then the object is moving toward the origin.
Option b – If the velocity is zero at an instant, then the acceleration should also be zero at that instant
If the distance S covered by a moving car in rectilinear motion with a speed v in time t is given by s = vt, then the car undergoes
(a) a uniform acceleration
(b) a non-uniform acceleration
(c) a uniform velocity
(d) a non-uniform velocity
Option c – a uniform velocity
The acceleration of a particle at a particular instant in time is called
(a) average acceleration
(b) Instantaneous acceleration
(c) average velocity
(d) None of the above
Option b – Instantaneous acceleration
Consider the following statements. I. Negative acceleration means velocity increases with time. II. A body is said to have non-uniform acceleration if either magnitude or direction or both of them change during motion. III. Zero acceleration means, velocity is uniform. Which of the statements given above is/are correct?
(a) I and II
(b) II and III
(c) I and III
(d) Only Il
Option b – II and III
Which of the following statements is false?
(a) A body can have zero velocity and still be accelerated.
(b) A body can have a constant velocity and still have a varying speed.
(c) A body can have a constant speed and still have varying velocities.
(d) the direction of the velocity of a body can change when its acceleration is constant.
Option b – A body can have a constant velocity and still have a varying speed
If an object moves with constant velocity, then which one of the following statements is not correct?
(a) Its motion is along a straight line.
(b) Its speed changes with time.
(c) Its acceleration is zero.
(d) Its displacement increases linearly with time.
Option d – Its displacement increases linearly with time
In a vacuum, a five-rupee coin, a feather of a sparrow bird, and a mango are dropped simultaneously from the same height. The time taken by them to reach the bottom is t₁, t₂, and t3, respectively. In this situation, we will observe that
(a) t₁>t₂> t3
(b) t₁>t3>t₂
(c) t3>t₁>t₂
(d) t₁ = t₁ = t3
Option d – t₁ = t₁ = t3
If the distance-time graph is a curve then it represents. ……..
(a) uniform speed
(b) constant displacement
(c) uniform momentum
(d) non-uniform speed
Option d – non-uniform speed
The distance-time graph for the motion of an object moving with a constant speed is a
(a) dot
(b) circle
(c) straight line
(d) curve
Option c – straight line
The slope of a distance-time graph shows
(a) acceleration
(b) momentum
(c) mass
(d) speed
Option d – speed
The displacement-time (st) graph of a particle acted upon by a constant force is
(a) a straight line
(b) a circle
(c) a parabola
(d) any curve depending upon initial conditions
Option c – a parabola
If an object is at rest, then the time (X-axis) versus distance (Y-axis) graph
(a) is vertical
(b) is horizontal
(c) has a 45° positive slope
(d) has 45° negative slope
Option b – is horizontal
A particle moves with uniform acceleration along a straight line from rest. The percentage increase in displacement during the 6th compared to that in the 5th is about
(a) 11%
(b) 22%
(c) 33%
(d) 44%
Option b – 22%
The motion of a freely falling body is an example of ………… accelerated motion ( Force and Laws of Motion Class 9 MCQ Online Test )
(a) non-uniformly
(b) uniformly
(c) uniquely
(d) specially
Option b – uniformly
A brick is thrown vertically from an aircraft flying 2 km above the earth. The brick will fall with an
(a) constant speed.
(b) constant velocity.
(c) constant acceleration.
(d) constant speed for some time than with constant acceleration as it means the earth.
Option c – constant acceleration
A ball is thrown vertically upward from the ground with a speed of 25.2 m/s. The ball will reach the highest point of its journey in
(a) 5.14 s
(b) 3.57 s
(c) 2.57 s
(d) 1.29 s
Option c – 2.57 s
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