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
```        If speed (v) and time (t) are related as t2-10vt+10000=0; then what can be the values of v?
a) All values more than or equal to 20 units
b) All values less than 20 units
c) All positive values are possible for v
d) No value of v can satisfy the given expression```
7 years ago

147 Points
```										Dear  Abhingya Patra
t2-10vt+10000=0
this equation is quadretic in time.
since time t is real positive value
solve this equation for t
t = {10v ± √(10v)2 -4*1*10000}/2
={10v  ± 10√v2 -400}/2
=5v   ± 5√(v2 -400)
for real value of t
v2 -400 ≥0
(v-20)(v+20) ≥0
V ≤-20  or v≥20
but negative value of t will give negative time which is not possible
so v≥20 is the solution
Please feel free to post as many doubts on our discussion forum as you can. If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE  & AIEEE preparation. All the best. Regards,Askiitians ExpertsBadiuddin
```
7 years ago
Think You Can Provide A Better Answer ?

## Other Related Questions on General Physics

View all Questions »
• Complete JEE Main/Advanced Course and Test Series
• OFFERED PRICE: Rs. 15,900
• View Details
• Kinematics & Rotational Motion
• OFFERED PRICE: Rs. 636
• View Details