Motion and Time - Chapter Wise CBSE Solved Question and Answer Based On NCERT
Very Short Q&A:
Q1: The basic unit of speed is
Km/ min
m/ min
Km/ sec
m/ sec
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Ans:
m/ sec
Q2: A faster moving object covers more distance in _________ time.
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Ans:
less
Q3: Speed = Distance/ Time. True/ False
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Ans:
True
Q4: What is the SI unit of distance?
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Ans:
Meter
Q5: Name an object that shows oscillatory motion.
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Ans:
Pendulum
Q6: What is the motion of our hands while running?
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Ans:
oscillatory motion
Q7: What is the motion of a child in a merry-go-round?
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Ans:
straight line motion
Q8: The time period of a given pendulum is not constant.True/ False
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Ans:
False
Q9: What is motion?
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Ans:
Motion is a change in the position of an object with time.
Q10: What is circular motion?
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Ans:
Motion of an object in a circular path is called circular motion e.g. Motion of the hands of a clock.
Q11: If the speed of an object keeps changing in equal interval of time, while moving along a straight line, its motion is said to be ___________________.
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Non-uniform
Q12: The to and fro motion of an object from the position of rest is called a___________________.
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Oscillatory motion.
Q13: One complete to and fro motion of a pendulum from rest position is called one______________.
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One oscillation
Q14: Give an example of vibratory motion.
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Simple Pendulum
Q15: Name the device on vehicles to track the distance covered.
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An odometer
Q16: The basic unit of time is _________.
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Second
Q17: Define average speed.
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The average speed of a moving object is defined as the total distance covered by it divided by the total time taken.
Q18: What do you mean by the statement; “car is moving with the speed of 50 Km per hour”?
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Car is moving with the speed of 50 Km per hour it means it will cover a distance of 50 Km in one hour
Q19: Define uniform motion.
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Objects that move in a straight line and maintain the same speed throughout the distance covered are said to be in uniform motion.
Q20: Define non- uniform motion.
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Objects that move in straight line and whose speed varies are said to be in non-uniform motion
Q21: The metallic ball in pendulum is called __________ of the pendulum.
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Bob
Q22: Give an example of oscillatory motion.
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Ans:
To and fro motion of a simple pendulum
Q23: The symbol of all units is written in _________________.
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Ans:
Singular
Q24: ________________motion may be along a straight line or along a curved path.
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Translatory motion
Q25: Motion along a curved path is called _______________.
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curvilinear motion
Q26: Name the device used to measure speed.
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speedometer
Q27: What type of graph is used to represent motion of an object?
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Ans:
distance-time graph
Q28: For a body in non-uniform motion, the graph is not a straight line. True/ False.
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Ans:
True
Q29: The working of a pendulum clock is based on the __________________ of its pendulum.
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Ans:
time period
Q30: Motion of the hammer of an electric bell is ___________________ motion.