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
giridhar reddy Grade:
        the velocity of a body becomes(1/nTH)of its velocity while passing through a plank,then the no of such planks required to just stop the bullet -------

7 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

 by using v^2=u^2+2as


 final velocity becomes u/n after passing through plank


 let width of each plank be d , thus from here we can find the retardation a=(u^2)-(u^2/n^2) /2d


  if N number of planks are placed, after passing through Nth plank the velocity of bullet becomes zero


 putting v=0 and s=Nd


we get 


              N=(n^2)/(n^2-1)

7 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: Rs. 15,900
  • View Details
  • Kinematics & Rotational Motion
  • OFFERED PRICE: Rs. 636
  • View Details

Ask Experts

Have any Question? Ask Experts

Post Question

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