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6th Grade > Physics

MOTION AND MEASUREMENTS OF DISTANCES MCQs

Total Questions : 98 | Page 5 of 10 pages
Question 41. Harshit is sitting inside a stationary bus. Which of the following objects will appear to be moving with respect to him?
  1.    Fellow passengers
  2.    Seats of the bus
  3.    The road on which bus stands
  4.    Another passing bus
 Discuss Question
Answer: Option D. -> Another passing bus
:
D
An object is in motion or at rest depending on the person who is observing it.
The objectswhich are moving with respect to the ground, are also moving with respect to Harshit. Hence, only another bus passing by will be moving with respect to him.
Question 42. When seen from the ground, an apple falling from a tree is under______motion.
  1.    rectilinear
  2.    periodic
  3.    oscillatory
  4.    circular
 Discuss Question
Answer: Option A. -> rectilinear
:
A
Apple is falling straight to the ground. When a body is travelling in a straight line, the bodyis said to be in a state of rectilinear motion.
Question 43. A troop of soldiers is marching along a straight line without changing their direction. Their motion will be called as rotational motion.
  1.    True
  2.    False
  3.    oscillatory
  4.    circular
 Discuss Question
Answer: Option B. -> False
:
B
When an object travels in a straight line, it is in linear motion. Here the troop of soldiers move in a straight line. So, they are in a state of linear motion.
When an object spins about an axis, it is termed as rotational motion. For example, the rotation of the Earth about its own axis.
Question 44. Which of the following object is in motion with respect to you if you are sitting in a moving train?
  1.    Seats in the train
  2.    Light bulb of the train
  3.    Windows of the train
  4.    Trees outside the train
 Discuss Question
Answer: Option D. -> Trees outside the train
:
D
An object is in motion or at rest depending on the person who is observing it.
The train and all parts of the train is at rest with respect to you because you are also part of the train. The trees outside the train are in motion as seen by you.
Question 45. Virat is given the task of measuring a rigid curved steel rod as shown in the figure.
Virat Is Given The Task Of Measuring A Rigid Curved Steel Ro...Which of the following objects should he use for getting the most accurate measurement?
  1.    Only a metre scale
  2.    A straight rod of known length
  3.    Both a metre scale and a thread
  4.    Only a thread
 Discuss Question
Answer: Option C. -> Both a metre scale and a thread
:
C
Virat cannot use a metre scale or a straight rod alone, as it cannot be bent along the curve. A thread and a metre scale can be used to measure the required length as shown in the diagram below. Virat Is Given The Task Of Measuring A Rigid Curved Steel Ro...A thread is taken and aligned with the curved steel rod. The end points are marked on the thread. Next, the length of the thread between the marked points is measured by a metre scale after straightening it.
Question 46. The revolution of the earth around the sun is periodic.
  1.    True
  2.    False
  3.    oscillatory
  4.    circular
 Discuss Question
Answer: Option A. -> True
:
A
Motion that repeats itself after a fixed interval of time is known as periodic motion.
The earth takes approximately the same time, i.e. 365 days to complete one revolution around the sun. Hence, it is a periodic motion.
Question 47. France created a standard unit of measurement in 1790. This system of measurement was known as ____.
  1.    metric system
  2.    unit system
  3.    S.I. system
  4.    cgs system
 Discuss Question
Answer: Option A. -> metric system
:
A
In 1790, the French created a standard unit of measurement called the metric system.
Metric system was first introduced in France but was widely accepted by both the world scientific community and many countries as the system of measurement.
Question 48. According to conversion of units of measurement:
1 m = 1000 cm
  1.    True
  2.    False
  3.    G1- Falling Stone, G2- Sleeping Camel
  4.    G1- Parked Car, G2- Flying Butterfly
 Discuss Question
Answer: Option B. -> False
:
B
Prefix is used with units to express relatively small or big quantity as compared to the base unit. Some prefix values are mentioned below:
Prefix Symbol
Prefix name
Value
k
kilo
1000
h
hecto
100
d
deci
0.1
c
centi
0.01
m
milli
0.001
1m=100×0.01m=100cm
Question 49.


Arrange the following modes of transportation from the earliest to the newest ones.


  1.     Roadways, Airways, Waterways
  2.     Airways, Waterways, Roadways
  3.     Roadways, Waterways, Airways
  4.     Waterways, Roadways, Airways
 Discuss Question
Answer: Option C. -> Roadways, Waterways, Airways
:
C
Roadways were the earliest mode of transportation followed by waterways and airways. The steam engine and the railroad were invented in the 19th century. Later, motorised boats and ships were developed as a means of water transport. The Wright brothers invented the aeroplane and gave the world another means of transport in the early 20th century.
Question 50.


Which of following is the fastest means of transportation?


  1.     Roadways
  2.     Airways
  3.     Waterways
  4.     Railways
 Discuss Question
Answer: Option B. -> Airways
:
B

Airways takes minimum time to travel from one place to another. Aeroplanes can travel at very high speeds and consume less time for transportation.


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