Activity 9.5 Class 9 Science Chapter 9 Force and Laws of Motion Solution

Activity 9.5 Class 9 Science Chapter 9 Force and Laws of Motion

Activity 9.5 Class 9 Science belongs to Chapter 9 Force and Laws of Motion   Class 9 Science. You will get a complete solution with an explanation and a conclusion. After reading activity 9.5, you will be able to answer the questions based on the activity.

Activity 9.5 Class 9 Science Chapter 9

 

You are suggested to study NCERT activity 9.5 class 9 science chapter 9 explanation with a conclusion so that you can attempt questions based on the activity 9.5 class 9 science.

Activity 9.5 Class 9 Science

   ·     Take a big rubber balloon and inflate it fully. Tie its neck using a thread. Also, use adhesive tape. Fix a straw on the surface of this balloon.

   ·     Pass a thread through the straw and hold one end of the thread in your hand or fix it on the wall.

   ·     Ask your friend to hold the other end of the thread or fix it on a wall at some distance.

   ·     Now remove the thread tied to the neck of the balloon. Let the air escape from the mouth of the balloon.

   ·     Observe the direction in which the straw moves.

    

Observation Activity 9.5 Class 9 Science

The straw along with the balloon moves opposite in the direction in which air escapes.

 Explanation Activity 9.5 Class 9 Science

This phenomenon is due to Newton’s third law of motion. When the thread is removed, the air escapes then due to reaction, the balloon with straw moves in the opposite direction.

According to the third law of motion - There is an equal and opposite reaction to an action.

Other examples of the third law of motion

   1. When a boatman pushes the river bank with a pole, the river bank offers an equal and opposite reaction. This reaction helps the boat to move ahead.

   2. When a gun recoils, an equal and opposite force is exerted on the gun. The gun moves backward.

   3. Motion of rocket and Jet aeroplanes.

 

Conclusion Activity 9.5 Class 9 Science

This activity demonstrates the ‘Third law of motion.’

Related  Topic 

1. Activity 9.6

2. Activity 9.4 Class 9 Science

3. Solutions of Chapter 9