Click to Chat

1800-2000-838

+91-120-4616500

CART 0

• 0

MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Amit Saxena Grade: upto college level
`        Estimate the speed of vertically falling raindrops from the following data. Radius of the drops = 0.02 cm, viscosity of air = 1.8 × 10-4 poise, g = 9.9 × 10 m s-2 and density of water = 1000 kg m-3. `
3 years ago

Jitender Pal
365 Points
```										Sol. To find the terminal velocity of rain drops, the forces acting on the drop are,
i) The weight (4/3)π r3 pg downward.
ii) Force of buoyancy (4/3)π r3 σg upward.
iii) Force of viscosity 6 π η r v upward.
Because, σ of air is very small, the force of buoyancy may be neglected. Thus,

6 π η r v = (4/3) πr2 pg or v = 2r2 pg/9η

```
3 years ago
Think You Can Provide A Better Answer ?

## Other Related Questions on Mechanics

View all Questions »
• Complete Physics Course - Class 12
• OFFERED PRICE: Rs. 2,756
• View Details
• Complete Physics Course - Class 11
• OFFERED PRICE: Rs. 2,968
• View Details