Short Answer Questions.
A. Give reasons for the following.
1. Motion is categorised in different types.
2. Musical instruments don't move as such, but produce vibratory motion.
3. Speed is a scalar quantity.
4. We always calculate average speed and not instant speed.
Answers
Answer:
1) In the world of mechanics, there are four basic types of motion. These four are rotary, oscillating, linear and reciprocating. Each one moves in a slightly different way and each type of achieved using different mechanical means that help us understand linear motion and motion control.
2) The column of air inside a wind instrument , the string of a string instrument. Explanation: the stretched skin of drum all vibret when played this vibration produced sound wave produced in the air, which we hear as musical notes
3) Speed is a scalar quantity – it is the rate of change in the distance travelled by an object, while velocity is a vector quantity – it is the speed of an object in a particular direction.
4) We can Say Average Speed is the Average of All the Instantaneous Speed in a given time interval. Speed is the Magnitude of Velocity, ie. the rate of Change of Distance over Time. Speed is Scalar Quantity.