CBSE Questions for Class 7 Physics Motion And Time Quiz 2 - MCQExams.com

A dancer demonstrating dance steps along a straight line. The position time graph is given. Find the average velocity for the dance step depicted by AB.

101695_7daf0c7038ff418dba39610a710e5535.png
  • $$1 m s^{-1}$$
  • $$1.33 m s^{-1}$$
  • $$2.75 m s^{-1}$$
  • $$0 m s^{-1}$$
Speed of a body depends on 
  • Time 
  • Mass of the body 
  • Distance travelled by the body 
  • Both A and C
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Assertion is incorrect but Reason is correct
Name one unit of time bigger than a second. 
  • plank time
  • zeptosecond
  • picosecond
  • kilosecond
Rain is falling vertically with a speed of 1.7 m/s. A girl is walking with speed of 1.0 m/s in the N - E (north-east) direction. To shield herself she holds her umbrella making an approximate angle $$\theta $$ with the vertical in a certain direction. Then
  • $$\theta=60^0 \:in \:N - E \:direction$$
  • $$\theta=30^0 \:in \:N - E \:direction$$
  • $$\theta=60^0 \:in \:S - W \:direction$$
  • $$\theta=30^0 \:in \:S - W \:direction$$
What is a leap year ?
  • $$366$$ days
  • $$365$$ days
  • $$364$$ days
  • $$363$$ days
A dancer demonstrating dance steps along a straight line. The position-time graph is given below.
Find the average velocity of the dancer during the time interval between t $$=$$ 4.5 s to t $$=$$ 9 s

101700_b8cb8084d1204a31a32af33eea63d104.PNG
  • $$1 m s^{-1}$$
  • $$-1.33 m s^{-1}$$
  • $$2.75 m s^{-1}$$
  • $$-0.89 m s^{-1}$$
Which of the following relations is correct?
  • Speed = $$\frac { 1 }{ Distance\times Time } $$
  • Speed = $$\frac { Time }{ Distance } $$
  • Speed = $$\frac { Distance }{ Time } $$
  • Speed = Distance $$\times $$ Time
Which of the following is not in uniform motion?
  • A bullet travelling with a constant speed in a straight line.
  • A swinging pendulum
  • The earth rotating about its axis
  • Both B & C
Which of the following is NOT matched correctly?
  • Speedometer: Speed
  • Odometer : Odour
  • Anemometer : Wind speed
  • Stopwatch : Time
Fill in the blank:

$$1$$ mean solar day = _____ $$s$$.
  • $$43200$$
  • $$86636$$
  • $$21600$$
  • $$10800$$
What is the value of $$1$$ nano-second in second?
  • $$10^{-9}$$
  • $$10^{-6}$$
  • $$10^{-8}$$
  • $$10^{-10}$$
With what speed should a car travel so that it can cover a distance of 5 km in 5 min?
  • 1 km/h
  • 5 km/h
  • 12 km/h
  • 60 km/h
A man runs $$10 \ km$$ in $$30 \ min.$$ What is his speed?
  • $$5 \ km/h$$
  • $$10 \ km/h$$
  • $$15 \ km/h$$
  • $$20 \ km/h$$
Which one of the following is travelling with the fastest speed?
  • An athlete running with a speed of 10 m/s
  • A bicycle moving with a speed of 200 m/min
  • A tortoise covering 100 metres in 15 minutes
  • A motorcycle moving with a speed one km/h
Find the odd one out:
  • Solar day
  • Moon day
  • Second
  • Light year
The cheetah is the fastest land animal that can attain a maximum speed of $$112~ km/h$$. Express this speed in $$m/s$$.
  • $$31 ~m/s$$ (approx.)
  • $$30 ~m/s$$ (approx.)
  • $$32 ~m/s$$ (approx.)
  • $$29 ~m/s$$ (approx.)
The odometer of a car reads $$57321.0\ km$$ when the clock shows the time 8:30 AM. The distance moved by car if, at 8:50 AM, the odometer reading has changed to $$57336.0\ km$$ and also the speed will be:
  • $$15\ km ,\ 45\, km/h$$
  • $$10km ,$$ $$45\, km/h$$
  • $$15km ,$$ $$55\, km/h$$
  • $$20km ,$$ $$45\, km/h$$
The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of 2 m/s. The driver sees in his rear view mirror the image of a truck parked behind his car. The speed at which the image of the truck appears to approach the driver will be ________________.
  • 1 m/s
  • 2 m/s
  • 4 m/s
  • 8 m/s
Which of the following is not the unit of time ?
  • Micro second
  • Leap year
  • Lunar months
  • Parallactic second
A boy running at an average speed of $$4 km/ hr$$ reaches school from his home in $$\dfrac{1}{2}\ hr$$. The distance of the school from his home is
  • $$2 km$$
  • $$8 km$$
  • $$4 km$$
  • $$6 km$$
What does the speed of a body describes about its motion ?
  • Direction
  • State
  • Type
  • Rapidity
The SI unit of speed is:
  • $$m/s$$
  • $$km/s$$
  • $$cm/s$$
  • None of these
Which of the following graphs represents the movement of a car that is slowing down and comes to a complete stop?
Calculate the distance travelled by a man walking at a speed of 5 km/hr in 36 minutes.
  • 3 km
  • 4 km
  • 5 km
  • 6 km
How many seconds are there in 12 hours?
  • 12 seconds
  • 720 seconds
  • 43200 seconds
  • 432000 seconds
  • None of these
The rate of change of velocity is called speed. True or false.
  • True
  • False
With what speed should a bus travel so that it can cover a distance of 10 km in 5 min?
  • 60 km/hr
  • 10 km/hr
  • 12 km/hr
  • 120 km/hr
A man runs $$20 \  km$$ in $$30 \ min.$$ What is his speed?
  • $$10 \ km/hr$$
  • $$20 \ km/hr$$
  • $$40 \ km/hr$$
  • $$25 \ km/hr$$
Which is not a necessary assumption for simple pendulum
  • in-extensible, light and flexible string.
  • heavy but small sized sphere (bob).
  • angular displacement from the mean position is very less.
  • volume of the bob is negligible.
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