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Class 9 Science
Describing Motion Around Us Chapter 4 Quiz 4
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What is the total distance traveled by the car?
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60 m
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20 m
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0 m
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80 m
The gradient(slope) of B is...
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0
0%
40m/min
0%
60m/min
0%
80m/min
The gradient(slope) of D is...
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0
0%
40m/min
0%
60m/min
0%
80m/min
If displacement∝(time)2, thenIf\ displacement\propto\left(time\right)^2,\ thenIf displacement∝(time)2, then
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acceleration =0
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accelaration is constant
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accelaration is non uniform
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The body is at rest
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Velocity is non uniform
If displacement ∝(time)3If\ displacement\ \propto\left(time\right)^3If displacement ∝(time)3 ,Then what can you say about the motion of the body?
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The body is accelerating non uniformly without respect to time
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The body is retarding
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The velocity is constant
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There is no displacement
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The body is accelerating with time
A truck driving at 60 miles per hour travels 150 miles. How long is it driving for?
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9000 hours
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0.4 hours
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210 hours
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2.5 hours
Ram travels at a speed of 20 km/hr while going to school. While coming back, he travels at a speed of 30 km/hr(due to less traffic). What his it’s average speed?
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25km/hr
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26km/hr
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20km/hr
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24km/hr
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Cant be determined
During which interval is the object traveling at a constant velocity?
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B to C
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D to E
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F to G
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it traveling at a constant velocity during all of the intervals shown.
Acceleration is
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increasing speed
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decreasing speed
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changing direction
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all of the above
This is a velocity-time graph. What is the object doing in segment C?
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Positive acceleration
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Negative acceleration
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Constant Velocity
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Not moving
When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then the retardation will be:
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(a) + 2 m/s2
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(b) − 2 m/s2
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(c) − 0.5 m/s2
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(d) + 0.5 m/s2
In which of the following cases of motions, the distance moved and the magnitude of the displacement are equal?i. If the car is moving on a straight roadii. If the car is moving in circular pathiii. The pendulum is moving to and froiv. The earth is moving around the sun
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(a) only(ii)
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(b) (i) and (iii)
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(c) (ii) and (iv)
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(d) only (i)
The slope of speed - time graph gives
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speed
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velocity
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momentum
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acceleration
Question 1. A worker covers a distance of 40 km from his house to his place of work, and 10 km towards his house back. Then the displacement covered by the worker in the whole trip is
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(a) zero km
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(b) 10 km
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(c) 30 km
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(d) 50 km
Question 17.Four cars A, B, C and D are moving on a levelled, straight road. Their distance time graphs are shown in the figure below. Which of the following is the correct statement regarding the motion of these cars?
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Car A is faster than car D
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Car B is the slowest
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Car D is faster than car C
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Car C is the slowest
Which of the following do you think travel in uniform velocity?
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A car in a circular track
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The Earth around the Sun
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A man running in a straight line
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A car travelling at uniform speed in a traffic road
If a puppy runs for 50 meters in 10 seconds , what was the puppies speed in kilometer per hour?
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5 m/s
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18m/hr
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18 km/s
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18 km/hr
David walks 3 km north, and then turns east and walks 4 km. What is the distance?
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7 km
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3 km
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4 km
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1 km
Which equation will you use if you are given the values of u, v and a to find distance?
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First eq of motion
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Second eq of motion
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Third eq Motion
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Insufficient data
A particle is moving in a circular path of radius r. The displacement after half circle will be
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r
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2r
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zero
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2.ƛ r
Which of the following is most likely not a case of uniform circular motion?
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(a) Motion of the earth around the sun
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(b) Motion of a toy train on a circular track
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(c) Motion of a racing car on a circular track
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(d) Motion of hours’ hand on the dial of a clock
Which of the following figures correctly represents uniform motion of a moving object?
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a
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b
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c
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d
Which one of the following graphs shows the object to be stationary?
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a
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b
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c
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d
A worker covers a distance of 40 km from his house to his place of work, and 10 km towards his house back. Then the displacement covered by the worker in the whole trip is
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zero km
0%
10 km
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30 km
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50 km
Rate of change of displacement is called
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Speed
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Deceleration
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Acceleration
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Velocity
SI Unit of measurement of acceleration is
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m/s
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m/s2
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m/hr
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M
Suppose a boy is enjoying a ride on a marry-go-round which is moving with a constant speed of 10 m/s. It implies that the boy is:
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(a) At rest
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(b) Moving with no acceleration
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(c) In accelerated motion
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(d) Moving with uniform velocity
Which of the following can sometimes be ‘zero’ for a moving body?i. Average velocityii. Distance travellediii. Average speed iv. Displacement
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(a) Only (i)
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(b) (i) and (ii)
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(c) (i) and (iv)
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(d) Only (iv)
. Which of the following statement is correct regarding velocity and speed of a moving body?
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(a) Velocity of a moving body is always higher than its speed
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(b) Speed of a moving body is always higher than its velocity
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(c) Speed of a moving body is its velocity in a given direction
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(d) Velocity of a moving body is its speed in a given direction
A car of mass 1000 kg is moving with a velocity of 10 m/s. If the velocity-time graph for this car is a horizontal line parallel to the time axis, then the velocity of the car at the end of 25 s will be:
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(a) 40 m/s
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(b) 25 m/s
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(c) 10 m/s
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(d) 250 m/s
0 h : 0 m : 1 s
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