The study of motion of objects, without consideration of its cause, is:
1. statics
2. kinematics
3. mechanics
4. dynamics
Subtopic:  Distance & Displacement |
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A batsman takes the first run by moving from \(A\) to \(B\) and then goes for the second run. When he reaches \(20~\text{yards}\) from \(B\) to \(D\) (see figure), he was run out. The net displacement of the batsman is:

1. \(2\) yards
2. \(20\) yards
3. \(22\) yards
4. \(42\) yards
Subtopic:  Distance & Displacement |
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Level 1: 80%+
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Given below are two statements: 
Assertion (A): Displacement of a body may be zero, when distance travelled by it is not zero.
Reason (R): The displacement is the longest distance between initial and final position.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Distance & Displacement |
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An automobile moving at a speed of \(40~\text{km/hr} \) can be brought to rest by applying brakes over a distance of \(40 ~\text{m}.\) If the automobile were instead moving at \(80~\text{km/h},\) what would be its minimum stopping distance (assuming the braking force remains the same and no skidding occurs)?
1. \(150~\text{m}\)
2. \(100~\text{m}\)
3. \(75~\text{m}\)
4. \(160~\text{m}\)
Subtopic:  Uniformly Accelerated Motion |
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The numerical ratio of displacement to the distance covered is always:

1. less than one
2. equal to one
3. equal to or less than one
4. equal to or greater than one
Subtopic:  Distance & Displacement |
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Level 1: 80%+
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The initial and final positions of a man on the \(x\text-\)axis are given for the following three cases:

(i) \((-4~\text m, 6~\text m)\)
(ii) \((4~\text m,-3~\text m)\)
(iii) \((-4~\text m, 2~\text m)\)


Which of these cases represent a negative displacement?
1. (i)
2. (ii)
3. (iii)
4. (i) and (iii)

Subtopic:  Distance & Displacement |
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Level 2: 60%+
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A car moving on a straight-line travels in same direction half of the distance with uniform velocity \(v_1\) and other half of the distance with uniform velocity \(v_2.\) The average velocity of the car is equal to:

1. \(\dfrac{2v_1v_2}{v_1+v_2}\)

2. \(\dfrac{v_1+v_2}{2}\)

3. \(v_1+v_2\)

4. \(\sqrt{v_1+v_2}\)
 
Subtopic:  Average Speed & Average Velocity |
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A car travels \(4\text{ km}\) distance with a speed of \(3\text{ km/h}\) and next \(4\text{ km}\) with a speed of \(5\text{ km/h}.\) What is the average speed of the car?

1. \(\dfrac{15}{2}\text{ km/hr}\)

2. \(\dfrac{15}{4}\text{ km/hr}\)

3. \(15\text{ km/hr}\)

4. \(10\text{ km/hr}\)
Subtopic:  Average Speed & Average Velocity |
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A particle moving in a straight line covers half the distance with speed \(\begin{equation} 6 \mathrm{~m} / \mathrm{s} \end{equation}\). The other half is covered in two equal time intervals with speeds \(\begin{equation} 9 \mathrm{~m} / \mathrm{s} \end{equation}\) and \(\begin{equation} 15 \mathrm{~m} / \mathrm{s} \end{equation}\) respectively. The average speed of the particle during the motion is :
1. \(\begin{equation} 8.8 \mathrm{~m} / \mathrm{s} \end{equation}\)
2. \(\begin{equation} 8 \mathrm{~m} / \mathrm{s} \end{equation}\)
3. \(\begin{equation} 9.2 \mathrm{~m} / \mathrm{s} \end{equation}\)
4. \(\begin{equation} 10 \mathrm{~m} / \mathrm{s} \end{equation}\)
 
Subtopic:  Average Speed & Average Velocity |
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Buses ply between two towns, \((A,B)\) separated by \(6~\text{km:} \) those going from \(A\) towards \(B\) go at \(20~\text{km/h} \) while those going from \(B\) to \(A\) go at \(30~\text{km/h}.\) If a passenger were to make a round trip from \(A\) to \(B\) and back, without stopping, his average speed will be:


1. \(25~\text{km/h}\)
2. \(24~\text{km/h}\)
3. \(27~\text{km/h}\)
4. \(28~\text{km/h}\)
Subtopic:  Average Speed & Average Velocity |
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Level 1: 80%+
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