Activity 11.11 Class 9 Science Chapter 11
Activity 11.11 Class 9 Science
belongs to Chapter 11 Work and Energy Class 9 Science. You will get a
complete solution with an explanation and conclusion. After reading activity
11.11, you will be able to answer the questions based on the activity.
Activity 11.11 Class 9 Science Work and Energy
You are suggested to study NCERT activity 11.11 class 9 science
chapter 11Work and Energy explanation with a conclusion so that you can attempt
questions based on activity 11.11 class 9 science.
Activity 11.11 Class 9 Science
· Lift
an object through a certain height.
· The
object can now do work. It begins to fall when released.
· This
implies that it has acquired some energy. If raised to a greater height it can do more work and hence possesses
more energy.
· From
where did it get the energy? Think and discuss.
Activity 11.11 Class 9 Science Chapter 11 Work and Energy
Observation of activity 11.11 class 9 science
When an object is lifted to a certain height, its position
changes.
Explanation of activity 11.11 class 9 science
When an object is lifted through a certain height,
work is done against the gravitational force of the earth.
The work done is stored in the form of gravitational
potential energy(mgh).
W=mgh
W= work=?
m = 1kg
g = 10m/s2
h=5m
W= 1×10×5= 50J
When the object is released, it starts falling to the
ground, potential energy is converted into kinetic energy and it hits the
ground.
Now, the object is lifted to a greater height, this time
more gravitational energy is stored in it because more work is done.
W=mgh
W= work= ?
m = 1kg
g = 10m/s2
h= 10 m
W= 1×10×10= 100J
So energy possessed by the object is due to work done
against gravity.
Conclusion of activity 11.11 class 9 science
This activity explains that gravitational potential energy is stored in the object due to work done against gravity.
Related Topics
1. Activity 11.12 Class 9 Science
2. Activity 11.10 Class 9 Science
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