Activity 11.4 Class 8 Science Chapter 11 Solution

Activity 11.4 Class 8 Science Force and Pressure

In this post, you will find NCERT Science Class 8 Chapter 11 Force and Pressure activity 11.4 with a complete explanation and conclusion. After reading this, you will be able to answer the questions based on the activity.

You are suggested to study NCERT activity 11.4 class 8 science explanation with a conclusion so that you can attempt questions based on activity 11.4 Class 8 science.

Activity 11.4 Class 8 Science

   ·    Take a ball and place it on a level surface as you did in Activity 11.3.

   ·    Make the ball move by giving it a push [Fig. (a)].

  ·    Now place a ruler in its path as shown in Fig. (b).

  ·    In doing so, you would apply a force on the moving ball.

  ·    Does the ball continue to move in the same direction after it strikes the ruler?

  ·    Repeat the activity and try to obstruct the moving ball by placing the ruler in such a way that it makes different angles to its path.

  ·    In each case note your observations about the direction of motion of the ball after it strikes the ruler.

      

 Activity 11.4 Class 8 Science Chapter 11 Solution

Observation and explanation 

 

When a ball is pushed, it starts moving in a particular direction with the initial velocity ‘u’.

Now we place a ruler in front of the ball, and the ball strikes the ruler and moves in another direction with velocity ‘v’.

A change in either the speed of an object, its direction of motion, or both, is described as a change in its state of motion. Thus, a force may bring a change in the state of motion of an object.

Conclusion 

We can conclude that a force can change the state of motion.