Coin and Feather Demo Manufacturer,Supplier and Exporter in India
Product Code : ILS-K-11679
Indian Lab Suppliers supplies the Coin and Feather Demo (Product ID: 11679) as part of its kinematics range. It shows that a feather and a metal disk fall at the same rate once the air is pumped out of the tube.
Quick Answer
The kit has a metal disk, a feather and a transparent acrylic tube 100 cm long and 3.75 cm in diameter, fitted with an evacuating valve. With air in the tube the feather drifts down slowly; after pumping out, both objects fall together because air resistance has been removed and gravity gives them the same acceleration. Any electric vacuum pump that reaches 24–27 inches of mercury (inHg) of vacuum can be used. The tube can be held by a student or mounted on a ring stand with a clamp (neither stand nor clamp is included). Handle the evacuated tube with care.
Key Specifications
| Parameter | Detail |
|---|---|
| Tube | Acrylic, 100 cm long, 3.75 cm diameter |
| Valve | Evacuating valve |
| Objects | Metal disk, feather |
| Pump needed | Electric vacuum pump reaching 24–27 inHg vacuum (not included) |
| Not included | Ring stand, clamp |
Where This Is Used
A class demonstration for free fall; timed drops with the G Ball (Product ID: 11656) then give a value for g. Browse the full Kinematics range or related Forces and Motion products.
Frequently Asked Questions
Is a vacuum pump included?
No, use an electric pump reaching 24 to 27 inHg of vacuum.
How long is the tube?
100 cm, with a 3.75 cm diameter.
Why do the objects fall together?
With the air removed there is no air resistance, so both accelerate at g.
Related Categories
Kinematics · Forces and Motion · Physics Lab Equipment
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