Online test of Chapter 8 Motion 1 Science| Class 9th
Questions :
1. A man walks from point A to B through semicircular track ACB as shown in figure. What is his distance and displacement?
Radius of Semi Circular track ACB
OB = OA = r
(a) Distance = 2πr, displacement = 2πr
(b) Distance = πr, displacement = 2πr
(c) Distance = 2πr, displacement = 2r
(d) Distance = πr, displacement = 2r
2. In accelerated motion, the path of the moving particle is
(a) straight line
(b) circular
(c) parabola
(d) all the above
3. If a particle is at rest, then its displacement-time graph will be
(a) a curve
(b) an inclined line
(c) a line parallel to time axis
(d) a line parallel time axis to displacement axis
4. A person travels from A to B through point C as shown in figure. Find the distance and displacement?
(a) Distance = 140m , displacement = 100m
(b) Distance = 140m , displacement = 120m
(c) Distance = 80m, displacement = 60m
(d) Distance = 100m , displacement = 100m
5. Which of the following does not represent accelerated motion?
(a) A Car changing its speed per second by 2km/hr
(b) A man walking slowly with speed of 2km/hr in a straight line
(c) A car is moving on a circular track with uniform speed of 20km/hr
(d) Both (b) and (c)
6. Identify a physical quantity which is not a vector
(a) displacement
(b) distance
(c) acceleration
(d) force
7. Which of the following is not true for displacement?
(a) It cannot be zero
(b) Its magnitude is greater than the distance
(c) Its unit is cm
(d) Its magnitude can be equal to the distance
8. A man starts his journey and gains a velocity of 10m/s in 2s. Find its acceleration?
(a) 5ms-2
(b) 2ms-2
(c) 1ms-2
(d) 10ms-2
9.Which of the following graphs represent uniform Motion ?
(a) Only (i)
(b) (i), (iii)
(c) (i), (ii)
(d) (ii),(iii)
10. A particle takes 6.28 seconds to complete one revolution. Its angular speed is
(a) 1 rad/s
(b) 2 rad/s
(c) 0.5 rad/s
(d) 3.14 rad/s
11.Find the total displacement made by the object in 7sec from origin where he has initial velocity of 10m/s according to the graph given below?
(a) 30m
(b) 40m
(c) 60m
(d) 20m
12. An object is said to be accelerated if?
(a) It speed varies
(b) Its stops from a velocity
(c) It’s direction changes
(d) All
13. Area under a ‘v-t’ graph represents a physical quantity which has the unit
(a) m2
(b) m
(c) m3
(d) ms-1
14. Which of the following equation of motion can be used always for both distance and displacement?
(a) v = u + at
(b) v2 – u2 =2as
(c) s = ut + 1 / 2at2
(d) All of the above
15. The velocity of the an object is directly proportional to the displacement made. What can be said about time of motion?
(a) Uniform motion
(b) Non-uniform Motion
(c) Uniformly accelerated Motion
(d) Non Uniformly accelerated
Chapter 8 Motion Quiz 1| Class 9th
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Question 1 of 15
1. Question
A man walks from point A to B through semicircular track ACB as shown in figure. What is his distance and displacement?
Radius of Semi Circular track ACB OB = OA = rCorrect
Since distance is through C, the distance made is ACB=semicircular track
= πr displacement =shortest distance=straight distance=diameter=2rIncorrect
Since distance is through C, the distance made is ACB=semicircular track
= πr displacement =shortest distance=straight distance=diameter=2r -
Question 2 of 15
2. Question
In accelerated motion, the path of the moving particle is
Correct
Incorrect
-
Question 3 of 15
3. Question
If a particle is at rest, then its displacement-time graph will be
Correct
Incorrect
-
Question 4 of 15
4. Question
A person travels from A to B through point C as shown in figure. Find the distance and displacement?
Correct
The shortest distance between any two point is the straight line, that is straight line AB
So By the Pythagoras theorem AB
Since, the distance is travelled through C, distance=AC+CB=80m+60m=140m
Incorrect
The shortest distance between any two point is the straight line, that is straight line AB
So By the Pythagoras theorem AB
Since, the distance is travelled through C, distance=AC+CB=80m+60m=140m
-
Question 5 of 15
5. Question
Which of the following does not represent accelerated motion?
Correct
speed and direction of object is constant is only in case b.
Incorrect
speed and direction of object is constant is only in case b.
-
Question 6 of 15
6. Question
Identify a physical quantity which is not a vector
Correct
Distance is a scalar quantity as it doesn’t depend on direction.
Incorrect
Distance is a scalar quantity as it doesn’t depend on direction.
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Question 7 of 15
7. Question
Which of the following is not true for displacement?
Correct
Displacement is the shortest distance between two points. Therefore, it can never be greater than distance.
Incorrect
Displacement is the shortest distance between two points. Therefore, it can never be greater than distance.
-
Question 8 of 15
8. Question
A man starts his journey and gains a velocity of 10m/s in 2s. Find its acceleration?
Correct
Incorrect
-
Question 9 of 15
9. Question
Which of the following graphs represent uniform Motion?
Correct
Case (i) : displacement is varying with time uniformly thus a equal distance at equal time.
Case(ii): Acceleration is constant , thus velocity is changing with respect to time.
Case(iii): Velocity is constant, thus speed is constant, thus uniform motion
Case (iv): Velocity is changing with respect to time, thus an accelerated motion hence non-uniform motion.
Incorrect
Case (i) : displacement is varying with time uniformly thus a equal distance at equal time.
Case(ii): Acceleration is constant , thus velocity is changing with respect to time.
Case(iii): Velocity is constant, thus speed is constant, thus uniform motion
Case (iv): Velocity is changing with respect to time, thus an accelerated motion hence non-uniform motion.
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Question 10 of 15
10. Question
A particle takes 6.28 seconds to complete one revolution. Its angular speed is
Correct
t = 6.28s, one revolution = 2π
ω = θ /t ⇒ ω = (2×3.14)/6.28 ⇒ ω = 6.28/6.28 = 1rad/s
Incorrect
t = 6.28s, one revolution = 2π
ω = θ /t ⇒ ω = (2×3.14)/6.28 ⇒ ω = 6.28/6.28 = 1rad/s
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Question 11 of 15
11. Question
Find the total displacement made by the object in 7 sec from origin where he has initial velocity of 10 m/s according to the graph given below?
Correct
Incorrect
-
Question 12 of 15
12. Question
An object is said to be accelerated if?
Correct
Acceleration is change in velocity that is change in speed or direction or both.
Incorrect
Acceleration is change in velocity that is change in speed or direction or both.
-
Question 13 of 15
13. Question
Area under a ‘v-t’ graph represents a physical quantity which has the unit
Correct
Area of graph = velocity × time = m/s × s = m
Incorrect
Area of graph = velocity × time = m/s × s = m
-
Question 14 of 15
14. Question
Which of the following equation of motion can be used always for both distance and displacement?
Correct
v2 – u2 = 2as contains scalar terms that are square of velocities v and u so it is a scalar equation. Other equations of motion are vector equations containing vector terms for displacement s, initial velocity v and final velocity v.
Incorrect
v2 – u2 = 2as contains scalar terms that are square of velocities v and u so it is a scalar equation. Other equations of motion are vector equations containing vector terms for displacement s, initial velocity v and final velocity v.
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Question 15 of 15
15. Question
The velocity of the an object is directly proportional to the displacement made. What can be said about time of motion?
Correct
Given velocity be V, time t
Velocity is directly proportional to time, that is velocity is increasing with respect to time so we can say that motion is accelerated in a uniform way.
So we can say that it is uniformly accelerated motion.
Incorrect
Given velocity be V, time t
Velocity is directly proportional to time, that is velocity is increasing with respect to time so we can say that motion is accelerated in a uniform way.
So we can say that it is uniformly accelerated motion.