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: 11
        
A car moving along a straight highway with speed of 126 km h -1 is
brought to a stop within a distance of 200 m. What is the retardation of
the car (assumed uniform), and how long does it take for the car to
stop?
(a) -3.06 m/s 2 ,11.44s
(b) 3.06 m/s 2 ,1.44s
(c) 36 m/s 2 ,1.44s
(d) 42.06 m/s 2 ,31.44s
one year ago

Answers : (1)

Vikas TU
6869 Points
							
From third law of eqn. of motion we get,
v^2 = u^2 + 2as
0^2 = (126000/3600)^2 + 2a*200
we get
a = –(1260/36)^2/400
   = – 3.0625 m/s^2.
 
and time=>
0 = 1260/36 – 3.0625*t
t = 11.44 seconds
one year ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

Get Extra Rs. 276 off

COUPON CODE: SELF10


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


Get Extra Rs. 297 off

COUPON CODE: SELF10

Ask Experts

Have any Question? Ask Experts

Post Question

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