Answer the following questions:
1. Define the terms rest and motion
2. Differentiate between slow and fast motio
3. Explain the methods to measure time
4. Measure the speed of an object
5. Identify the units of time and speed
Answers
Answer:
The first thing we need to know is that there is no absolute rest or absolute motion. Rest and motion are relative terms.
In simple terms, an object that changes its position is said to be in motion while the opposite action causes an object to be at rest. However, perspective plays a huge role in it. Take the example of an atom which is always in motion but when we see an object in the macro world it seems to be at rest. Therefore, rest and motion both depend mainly on the frame of reference of the one who is observing the scene.
2.An object which takes a longer time to cover a certain distance is called slow motion whereas an object which takes a shorter time to cover the same distance is said to be fast motion .
3.Time can be measured by a stop watch. The button needs to be pressed before the starting if event and again as the event ends. For more accurate measurements, instruments like chronometer can be used.4.Speed is the rate at which an object's position changes, measured in meters per second. The equation for speed is simple: distance divided by time. You take the distance traveled (for example 3 meters), and divide it by the time (three seconds) to get the speed (one meter per second).
5.Units for Measurement of Time and Speed - definition
Physical Quantity Unit
Time second (s), millisecond (ms) , minute (min) , hour (hr)
Speed metre/second (m/s), kilimetre/hour (km/hr)
follow me mark brainliest