This activity demonstrates the weightlessness and the effect of acceleration on the weight. We have already learnt how air resistance affects falling objects in activity 11.3.
NIOS Class 10 Science and Technology (212)
Project File
This activity is based on the NIOS Class 10 science
and technology (212) Chapter 11- Gravitation, Module 3- Moving Things.
Effect of Acceleration on the Weight of an Object
Aim
To observe the change in weight of a book held in
hand during acceleration
Materials Required
1. Heavy
book
Procedure
We hold a heavy book in our palm. First, we keep hands
steady and feel the weight of the book.
.webp "Effect of Acceleration on the Weight of an Object")
Then we quickly move our hand downward with some
acceleration. We notice the change in the feeling of the weight of the book in hand.
Observation
We observe that:
When the hand is steady, the book feels heavy
When the hand is moved downward with acceleration, the
book feels lighter.
Explanation
In the process, the actual weight of the book remains unchanged; its apparent weight changes because the hand and the book are accelerated
downward.
When the hand comes downward, the force on the book
decreases, so the book feels lighter.
Conclusion
We can conclude that the apparent weight of the book
decreases when it is accelerated downward due to a decrease in the force acting on
it.
All Activities Solutions of Gravitation
Frequently Asked Questions
1. Does the actual weight of the book change in
this activity?
Answer – No, the actual weight of the book remains the
same.
2. Is
this effect similar to weightlessness in space?
Answer- Yes, astronauts feel weightlessness in orbit because
the spacecraft is in continuous free fall around the Earth.
3. What
would happen if the hand moved upward?
Answer - The book would feel heavier because the supporting
force increases.
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