NIOS Class 10 Activity 9.1 Motion and Its Description

This activity helps us understand and identify different types of motion.

 

NIOS Class 10 Science and Technology Project File

This activity is based on the NIOS Class 10 science and technology (212)Chapter 9- Motion and its description.

Aim of the activity

To observe and classify the type of motion

Material Required

   1. Small stone

    2. String

Procedure

 We take a small stone and tie it with one end of a string. Now we perform the following in three steps:

(A)   We suspend the stone and pull it slightly to one side and release it.

(B)    We bring the stone to its point of suspension and release it.

(C)    We held the stone in our hand and rotated it over our head in a horizontal circle.

Observation

Case	Type of motion	Justification
A	Oscillatory motion	The stone swings back and forth about a fixed point like a pendulum
B	No motion	The stone hangs vertically and does not move
C	Circular motion	The stone moves in a circular path around the hand

 

Explanation

Case A: Oscillatory motion

When we pull the stone to one side and let it go, it moves back and forth; this is called an oscillatory motion. Example – Pendulum of a wall clock

Case B:  Rest

When we leave the stone hanging straight down, it does not move, so the stone is at rest (no motion ).

Case C: Circular Motion

When we spin the stone around over our head, it goes in a circle; this is called a circular motion.

Conclusion

 This activity illustrates the various types of motion an object can exhibit.

Frequently Asked Questions

    1.  What is oscillatory motion?

Answer – This is a repetitive back-and-forth movement about a central position.

    2. Why is the stone at rest in case B?

Answer – Because no external force is applied to the stone.

    3. What force keeps the stone in circular motion?

Answer – Centripetal force