badge image

Enroll For Free Now & Improve Your Performance.

×
User Icon
User Icon
User Icon
User Icon
User Icon

Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
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
Menu
Grade: upto college level

                        

A parachutist is in free fall before opening her chute. The net force on her has magnitude F and is directed down; this net force is somewhat less than her weight W because of air friction. Then she opens her chute. At this instant after her chute fully inflates the net force o her is (A) greater then F and still directed down. (B) less than F and still directed down. (C) zero. (D) directed upward but could be more or less than F.

5 years ago

Answers : (1)

Deepak Patra
askIITians Faculty
471 Points
							The correct option is (B) less than F and still directed down.
If W is the weight of the system, f is the drag force of the system and since the net force (F) is directed down, then the net force acting on the system (F) will be,
F = W-f …… (1)
When she opens her chute, the drag force (f) will be increased. So increasing the drag force the right hand side of the equation (1) will be decreased results the net force on the on her (left hand side of equation (1) ) is decreased. Therefore when she opens her chute, the net force on her is less than F and still directed down.
From above observation we conclude that, at the instant after her chute fully inflates the net force on her is less than F and still directed down. Thus option (B) is correct.
5 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 101 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 110 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details