Understanding Motion through Experience
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
What is Motion?-advanced
SubtopicWhat is Motion?-advanced under Understanding Motion through Experience for Grade 9 CBSE.
Preview questions (no answers)
- 1.
If the displacement of an object is proportional to square of time, then the object moves with:
A.Uniform velocity
B.Uniform acceleration
C.Increasing acceleration
D.Decreasing acceleration
- 2.
Motion along a straight line is the ______ type of motion.
A.Most complex
B.Simplest
C.Fastest
D.Slowest
- 3.
In everyday life, most of the motions we see are:
A.Uniform
B.Non-uniform
C.Circular
D.Oscillatory
- 4.
The position of a person on a map is usually given relative to:
A.The clouds
B.A fixed landmark
C.The person's shadow
D.A moving car
- 5.
An object is being monitored from a fixed reference point . It is observed that at any time , the distance is always exactly , but the direction of relative to is changing at a constant rate. Which statement correctly evaluates the state of motion of object ?
A.The object is at rest because its distance from the reference point does not change.
B.The object is in motion because its position vector is changing over time.
C.The object is in linear motion because it maintains a fixed distance.
D.The object is at rest because its total displacement after one full revolution is zero.
- 6.
A cruise ship is traveling at a constant speed of due East relative to the water. A seagull is flying at due East relative to the water, directly above the ship. Meanwhile, a passenger is walking on the deck towards the stern (back) of the ship at relative to the deck. Based on the concept of relative motion, which of the following is true?
A.The passenger is at rest relative to the water.
B.The seagull is at rest relative to the ship.
C.The passenger is at rest relative to the seagull.
D.The seagull is at rest relative to the water.
- 7.
Which of the following can be calculated by finding the area under a speed-time graph?
A.Acceleration
B.Velocity
C.Distance covered
D.Average speed
- 8.
The motion of a particle is described by the equation . The distance travelled by the particle in the first is:
A.B.C.D. - 9.
A person travels along a straight road for the first half time with a velocity and the next half time with a velocity . What is the average velocity of the person?
A.B.C.D. - 10.
For a particle moving in a straight line, the displacement at time is given by . The acceleration of the particle when its velocity is zero is:
A.B.C.Insufficient data
D.None of these
Download the worksheet for Understanding Motion through Experience - What is Motion?-advanced to practice offline. It includes additional chapter-level practice questions.
Frame of Reference-advanced
SubtopicFrame of Reference-advanced under Understanding Motion through Experience for Grade 9 CBSE.
Preview questions (no answers)
- 1.
An inertial frame of reference is one in which ________ law of inertia holds true.
A.Newton's first
B.Newton's second
C.Newton's third
D.Kepler's
- 2.
To describe the position of an object in a 2D plane, we need:
A.One coordinate
B.Two coordinates
C.Three coordinates
D.No coordinates
- 3.
Which of the following describes the state of a book lying on a table?
A.At rest relative to the Earth
B.In motion relative to the Sun
C.At rest relative to the table
D.All of the above
- 4.
A man is walking inside a train in the direction of the train's motion. His speed relative to the ground is:
A.Train speed - Man's speed
B.Train speed + Man's speed
C.Only the train's speed
D.Only the man's speed
- 5.
Can the displacement of an object be different for two different observers?
A.No, displacement is an absolute quantity
B.Yes, if the observers are in different frames of reference moving relative to each other
C.Yes, but only if one observer is moving faster than light
D.No, only velocity can be relative
- 6.
Which of the following is an example of a relative motion experience?
A.Feeling a breeze while standing still
B.Seeing the trees move backward while looking out of a moving car window
C.A clock ticking on the wall
D.The weight of a book on a table
- 7.
If you drop a ball in a car that is decelerating (slowing down), where will the ball land relative to the point directly below where it was dropped?
A.Directly below
B.Slightly in front of the point
C.Slightly behind the point
D.To the left of the point
- 8.
Which of the following remains invariant (unchanged) under Galilean Transformation?
A.Velocity
B.Position
C.Acceleration
D.Momentum
- 9.
Two trains, each of length , are running on parallel tracks. One overtakes the other in and one crosses the other in when moving in opposite directions. Their speeds are:
A.and
B.and
C.and
D.and
- 10.
A person walks at on a treadmill moving at in the opposite direction. The work done by the person relative to the ground is:
A.Positive
B.Negative
C.Zero
D.Infinite
Download the worksheet for Understanding Motion through Experience - Frame of Reference-advanced to practice offline. It includes additional chapter-level practice questions.
Scalars and Vectors-advanced
SubtopicScalars and Vectors-advanced under Understanding Motion through Experience for Grade 9 CBSE.
Preview questions (no answers)
- 1.
The physical quantity which has the same unit as speed is:
A.Acceleration
B.Velocity
C.Displacement
D.Momentum
- 2.
Which of the following is a scalar quantity?
A.Energy
B.Weight
C.Velocity
D.Force
- 3.
If an object moves to the right and then to the left, its net displacement is:
A.B.C.D. - 4.
A scalar quantity can be completely described by its:
A.Direction only
B.Magnitude only
C.Both magnitude and direction
D.Unit only
- 5.
A jogger runs along the perimeter of a regular hexagonal field where each side has a length . If the jogger starts at one vertex and stops after covering exactly half of the total perimeter, what is the magnitude of the jogger's displacement from the starting point?
A.B.C.D. - 6.
An automated toy car moves along a track in a warehouse. It starts at point A, travels North to point B, then East to point C, and finally South to point D. Which of the following correctly describes the total distance covered and the magnitude of the net displacement of the toy car?
A.Distance: , Displacement:
B.Distance: , Displacement:
C.Distance: , Displacement:
D.Distance: , Displacement:
- 7.
What is the slope of the velocity-time graph for a body moving with constant velocity?
A.B.C.D.Infinite
- 8.
The ratio of the magnitude of displacement to distance is always:
A.Less than 1
B.Greater than 1
C.Equal to 1
D.Less than or equal to 1
- 9.
A particle moves North, then East. The magnitude of displacement and the direction are:
A., North-East
B., East of North
C., East of North
D., North-East
- 10.
A body is moving with uniform velocity . If it is subjected to a constant retardation , it will come to rest after a time . The distance traveled during this time is:
A.B.C.D.
Download the worksheet for Understanding Motion through Experience - Scalars and Vectors-advanced to practice offline. It includes additional chapter-level practice questions.
Vector Addition (Graphical Method)-advanced
SubtopicVector Addition (Graphical Method)-advanced under Understanding Motion through Experience for Grade 9 CBSE.
Preview questions (no answers)
- 1.
In the graphical method, the scale chosen should be:
A.As small as possible
B.As large as possible to fit the paper
C.Ignored
D.Always 1:1
- 2.
If vector is towards North and vector is towards West, the resultant vector points towards:
A.North-East
B.South-West
C.North-West
D.South-East
- 3.
To add four vectors graphically using the head-to-tail method, how many arrows are drawn in total including the resultant?
A.4
B.5
C.3
D.8
- 4.
Which of these represents a 'null vector'?
A.A vector with magnitude 1
B.A vector with no direction and zero magnitude
C.A vector pointing North
D.A vector with infinite magnitude
- 5.
When adding vectors , , and using the head-to-tail method, the resultant is the vector from:
A.The head of to the tail of
B.The tail of to the head of
C.The tail of to the tail of
D.The head of to the head of
- 6.
If two displacement vectors are each and their resultant is also , what is the angle between the two vectors?
A.B.C.D. - 7.
What is the angle between the resultant and vector if and are equal in magnitude and perpendicular to each other?
A.B.C.D. - 8.
A physical quantity is calculated as the vector sum of four other quantities and . If and are represented by the consecutive sides of a semi-regular octagon, the resultant is:
A.Zero
B.The vector connecting the start of A to the end of D
C.The sum of their magnitudes
D.A vector parallel to B
- 9.
A vector when added to gives a resultant along the y-axis with magnitude 10. Vector is:
A.B.C.D. - 10.
A boat can travel at in still water. It crosses a wide river in 12 minutes by the shortest possible path. The speed of the river flow is:
A.B.C.D.
Download the worksheet for Understanding Motion through Experience - Vector Addition (Graphical Method)-advanced to practice offline. It includes additional chapter-level practice questions.
Equations of Motion-advanced
SubtopicEquations of Motion-advanced under Understanding Motion through Experience for Grade 9 CBSE.
Preview questions (no answers)
- 1.
The three equations of motion are valid only for motion along a:
A.Circular path
B.Straight line
C.Zig-zag path
D.Parabolic path
- 2.
For a body starting from rest and moving with uniform acceleration, the distance traveled is proportional to:
A.Time ()
B.Square of time ()
C.Velocity ()
D.Square root of time ()
- 3.
A body is moving with a uniform velocity of . The acceleration after is:
A.B.C.D. - 4.
In the equation , if the body starts from rest and , , then is:
A.B.C.D. - 5.
An object is moving with a velocity of . If it is subjected to a constant retardation of , how much distance will it travel before its velocity becomes ?
A.24 m
B.48 m
C.12 m
D.36 m
- 6.
Two cars A and B start from rest. Car A accelerates at and Car B at . After , the distance between them (if moving in the same direction) is:
A.25 m
B.50 m
C.75 m
D.100 m
- 7.
A stone is dropped into a well deep. The sound of splash is heard after . If , what is the speed of sound?
A.320 m/s
B.340 m/s
C.360 m/s
D.300 m/s
- 8.
A body starting from rest covers a distance of in the second. The acceleration of the body is:
A.B.C.D. - 9.
The displacement of a particle is given by where is in meters and in seconds. The distance covered by the particle in the first seconds is:
A.B.C.D. - 10.
A body is thrown vertically upward with velocity . The distance traveled by it in the fifth and the sixth seconds are equal. The velocity is: (Take )
A.B.C.D.
Download the worksheet for Understanding Motion through Experience - Equations of Motion-advanced to practice offline. It includes additional chapter-level practice questions.