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:
        

A fast duck is flying (20i+40j)mi/h at the same altitude as a slow aeroplane flying with a velocity of (-80i+40j)mi/h.How fast and in what direction is the duck moving relative to the airplane.

8 years ago

Answers : (1)

vikas askiitian expert
509 Points
							

velocity of duck = Vd = 20i + 40j

velocity of aeroplane Va = -80i + 40j

velocity of duck wrt plane = Vad = Vd - Va = 100 i             ans            

 cos@ = a.b/(ab)                               (@ is angle with duck is moving wrt plane) (a.b = dot product )

         = -2/root5

@ = cos-1(-2/root5)                        ans

 

approve if u like my ans

8 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