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Q 01 / 25
An object moving along a straight line must have a non-zero acceleration.
Q 02 / 25
Distance travelled by a particle is always greater than or equal to the magnitude of its displacement.
Q 03 / 25
A body can have zero displacement even if it has travelled a non-zero distance.
Q 04 / 25
Average speed of a particle is always equal to the magnitude of its average velocity.
Q 05 / 25
If the velocity of a body is zero at some instant, its acceleration must also be zero at that instant.
Q 06 / 25
In one-dimensional motion, the sign of velocity tells the direction of motion along the chosen axis.
Q 07 / 25
If acceleration of a particle moving in a straight line is zero, its speed must remain constant.
Q 08 / 25
A position–time graph that is a straight line with positive slope represents motion with constant positive acceleration.
Q 09 / 25
A velocity–time graph with a horizontal straight line above the time axis represents motion with constant non-zero acceleration.
Q 10 / 25
The area under a velocity–time graph between two instants gives the displacement in that time interval.
Q 11 / 25
For motion in a straight line with constant acceleration, the relation \(v = u + at\) holds, where symbols have their usual meaning.
Q 12 / 25
The equation \(s = ut + \tfrac{1}{2}at^{2}\) is valid for any motion in a straight line, irrespective of whether acceleration is constant or variable.
Q 13 / 25
If a particle moving in a straight line has a negative acceleration, its speed must always decrease.
Q 14 / 25
In one-dimensional motion with constant acceleration, the equation \(v^{2} = u^{2} + 2as\) does not contain explicit time dependence.
Q 15 / 25
A body thrown vertically upward (taking upward as positive) has constant negative acceleration throughout its flight, neglecting air resistance.
Q 16 / 25
If the displacement of a particle along a straight line is given by \(x(t) = 5t^{2}\) (in SI units), its acceleration is constant.
Q 17 / 25
For a particle executing one-dimensional motion, the instantaneous velocity at any instant equals the slope of the tangent to its position–time graph at that instant.
Q 18 / 25
If the velocity–time graph of a particle is a straight line passing through the origin with positive slope, the particle starts from rest with constant acceleration.
Q 19 / 25
Two particles move along the same straight line; if at some instant they have the same velocity, they must have the same acceleration at that instant.
Q 20 / 25
In one-dimensional motion, if a particle’s speed is increasing, its acceleration must be positive.
Q 21 / 25
If the acceleration of a particle moving in a straight line is always directed opposite to its velocity, the particle can reverse its direction of motion at most once.
Q 22 / 25
For any one-dimensional motion, the magnitude of average acceleration between two instants can never exceed the maximum magnitude of instantaneous acceleration in that interval.
Q 23 / 25
A particle moves along a straight line such that its speed–time graph is a circle of non-zero radius; this motion is impossible in one dimension.
Q 24 / 25
Two particles move along a straight line with constant but different accelerations; if their position–time graphs intersect at two distinct points, they meet each other twice.
Q 25 / 25
If a particle moves along a straight line such that its acceleration is proportional to time (\(a \propto t\)), the graph of its velocity versus time is a straight line parallel to the time axis.

Frequently Asked Questions

Motion is the change in position of an object with time relative to a chosen reference point.

It is motion where an object moves along a single straight path, also called one-dimensional motion.

A reference point is a fixed point relative to which the position and motion of an object are described.

Yes, rest and motion depend on the observer’s frame of reference.

Distance is the total length of the actual path travelled by an object, irrespective of direction.

Displacement is the shortest straight-line distance between initial and final positions, with direction.

Because it has both magnitude and direction.

Yes, when an object returns to its starting point.

Speed is the rate at which distance is covered with time.

Velocity is the rate of change of displacement with time and includes direction.

Speed is scalar; velocity is vector and depends on direction.

Average speed is total distance travelled divided by total time taken.

Average velocity is total displacement divided by total time.

When motion is along a straight line without change in direction.

Velocity of an object at a particular instant of time.
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