Very Short Q&A:
Q1: The basic unit of speed is
(i) Km/ min
(ii) m/ min
(iii) Km/ sec
(iv) m/ sec
Ans : (iv) m/ sec
Q2: A faster moving object covers more distance in _________ time.
Ans : less
Q3: (Speed = Distance/ Time). True/ False
Ans : True
Q4: What is the SI unit of distance?
Ans : Meter
Q5: Name an object that shows oscillatory motion.
Ans : Pendulum
Q6: What is the motion of our hands while running?
Ans : oscillatory motion
Q7: What is the motion of a child in a merry-go-round?
straight line motion
Q8: The time period of a given pendulum is not constant.True/ False
Ans : False
Q9: What is motion?
Ans : Motion is a change in the position of an object with time.
Q10: What is circular motion?
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 ___________________.
Ans : Non-uniform
Q12: The to and fro motion of an object from the position of rest is called a___________________.
Ans : Oscillatory motion.
Q13: One complete to and fro motion of a pendulum from rest position is called one______________.
Ans : One oscillation
Q14: Give an example of vibratory motion.
Ans : Simple Pendulum
Q15: Name the device on vehicles to track the distance covered.
Ans : An odometer
Q16: The basic unit of time is _________.
Ans : Second
Q17: Define average speed.
Ans : 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”?
Ans : 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.
Ans : 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.
Ans : 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.
Ans : Bob
Q22: Give an example of oscillatory motion.
Ans : To and fro motion of a simple pendulum
Q23: The symbol of all units is written in _________________.
Ans : Singular
Q24: ________________motion may be along a straight line or along a curved path.
Ans : Translatory
Q25: Motion along a curved path is called _______________.
Ans : curvilinear motion
Q26: Name the device used to measure speed.
Ans : Speedometer
Q27: What type of graph is used to represent motion of an object?
Ans : distance-time graph
Q28: For a body in non-uniform motion, the graph is not a straight line. True/ False.
Ans : True
Q29: The working of a pendulum clock is based on the _____________ of its pendulum.
Ans : time period
Q30: Motion of the hammer of an electric bell is ___________________ motion.
Ans : Oscillatory motion