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14 questions · self-marked practice — reveal the answer and mark yourself.

Question 11 Mark
Branch of mechanics that deals with study of motion of objects without considering the cause of motion is known as ______.
Answer
Branch of mechanics that deals with study of motion of objects without considering the cause of motion is known as kinematics.
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Question 21 Mark
Distance travelled in the $n^{th}$ interval of time in uniform accelerated motion is Sn = ______.
Answer
Distance travelled in the $n^{th}$ interval of time in uniform accelerated motion is Sn = $\text{u}+\frac{\text{a}}{2}(2\text{n}-1)$
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Question 31 Mark
In uniform motion, velocity-time graph is a straight line parallel to ______.
Answer
In uniform motion, velocity-time graph is a straight line parallel to time axis.
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Question 41 Mark
Instantaneous velocity is _______ to average velocity in uniform motion.
Answer
Instantaneous velocity is equal to average velocity in uniform motion.
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Question 51 Mark
In uniform motion, position-time graph is _______ and velocity of the body remains _______.
Answer
In uniform motion, position-time graph is straight line and velocity of the body remains constant.
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Question 61 Mark
A student goes from his house to his friend's house with speed $v_1$. Finding the door of his friend's closed, returns back to his own house with the speed $v_2$. Then the average speed of the student is ______.
Answer
A student goes from his house to his friend's house with speed $v_1$. Finding the door of his friend's closed, returns back to his own house with the speed $v_2$. Then the average speed of the student is $\frac{\text{v}_1\text{v}_2}{\text{v}_1+\text{v}_2}.$
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Question 71 Mark
When distance covered by a moving object in a particular time interval is much greater than size of the object, then object is said to be­ ______.
Answer
When distance covered by a moving object in a particular time interval is much greater than size of the object, then object is said to be­ point object.
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Question 81 Mark
The slope of tangent at any point on position-time graph is the measure of _______.
Answer
The slope of tangent at any point on position-time graph is the measure of instantaneous velocity.
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Question 91 Mark
Minimum distance between initial and final position of moving object in a given time interval is the measure of ______.
Answer
Minimum distance between initial and final position of moving object in a given time interval is the measure of displacement.
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Question 101 Mark
The engine of a train passes an electric pole with a velocity u and the last compartment of the train crosses the same pole with a velocity v. Then the velocity with which the mid-point of the train passes the pole is ______.
Answer
The engine of a train passes an electric pole with a velocity u and the last compartment of the train crosses the same pole with a velocity v. Then the velocity with which the mid-point of the train passes the pole is $\sqrt{\frac{\text{u}_2+\text{v}_2}{2}}.$
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Question 111 Mark
If the velocity of an object decrease with time, then its acceleration is______.
Answer
If the velocity of an object decrease with time, then its acceleration is negative.
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Question 121 Mark
In uniform accelerated motion, position-time graph is ______.
Answer
In uniform accelerated motion, position-time graph is parabolic.
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Question 131 Mark
Distance is always greater than or ______ displacement of moving body in a given time interval.
Answer
Distance is always greater than or equal displacement of moving body in a given time interval.
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Question 141 Mark
Instantaneous acceleration of a particle moving along x-axis with displacement $x = 18t + 5r^2$; is ______.
Answer
Instantaneous acceleration of a particle moving along x-axis with displacement $x = 18t + 5r^2; is ~10ms^{-2}$.
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