Activity 11.3 Class 8 Science Chapter 11 Solution

Activity 11.3 Class 8 Science Force and Pressure

In this post, you will find NCERT Science Class 8 Chapter 11 Force and Pressure which consists of a complete explanation.

You are suggested to study NCERT activity 11.3 class 8 science explanation with a conclusion so that you can attempt questions based on activity 11.3 Class 8 science.

Activity 11.3 Class 8 Science

   ·     Take a rubber ball and place it on a level surface such as a tabletop or a concrete floor.

   ·     Now, gently push the ball along the level surface.

   ·      Does the ball begin to move?

   ·     Push the ball again while it is still moving.

   ·     Is there any change in its speed?

   ·      Does it increase or decrease?

   ·     Next, place your palm in front of the moving ball.

   ·     Remove your palm as soon as the moving ball touches it.

   ·      Does your palm apply force on the ball?

   ·     What happens to the speed of the ball now?

   ·     Does it increase or decrease?

    ·      What would happen if you let your palm hold the moving ball?

      

Force applied on the moving object

Observation and explanation 

When we push the ball, it starts moving on the surface at a uniform speed.

When a force (push) is applied to the moving ball, its speed increases.

Now we place our palm in front of the moving ball, its speed decreases but when we hold the ball with our palm, its speed becomes zero.

So when a force is applied to an object or a body, it may change its speed.

When the force applied to the object is in the direction of the motion, the speed of the object increases.

But when the force is in the direction opposite to the motion, the speed decreases.

 

Conclusion 

This activity shows that force applied to the object can change the speed of the object or change the direction of motion.

Related Topics

1. Activity 11.4

2. Activity 11.2