Answer the following:
Q.1: The distance covered by an object in a unit time as the __________ of the object.
Q.2: If the speed of an object moving along a straight line keeps changing, its motion is said to be ____________________.
Q.3: If an object moves along a straight line with a constant speed, it is said to be in _______________ motion.
Q.4: The time between one sunrise and the next was called a __________.
Q.5: A ___________ was the fixed time taken by the earth to complete one revolution of the sun.
Q.6: Clocks use the ___________ motion.
Q.7: The small metallic ball is called ________ of pendulum.
Q.8: The to and fro motion of a simple pendulum is an example of a __________ or an ___________ motion.
Ans: periodic, oscillatory
Q.9: The time taken by the pendulum to complete one oscillation is called its ______________.
Ans: time period
Q.10: To measure the time period of a pendulum we need a ______________.
Q.11: The basic unit of time is ____________.
Q.12: The clocks or watches having electric circuit with one or more cells are called ______________.
Ans: quartz clocks
Q.13: The basic unit of speed is _________.
Q.14: The symbols of all units are written in ____________.
Q.15: The meter that measures the distance moved by the vehicle is known as _________________.
Q.16: Distance covered = ___________ x __________
Ans: speed, time
Q.17: The meter which shows the speed of the vehicle is known as ____________.
Q.18: The distance-time graph is a __________ graph.
Q.19: If the distance-time graph is a straight line, it indicates that the object is moving with a ____________ speed.
Q.20: Motion of objects can be presented in a pictorial form by their _______________ graphs.