×

# Can someone help me with this problem?

The driver of a train moving at a speed $$v_1$$ sights a goods train at a distance d ahead of him on the same track moving in the same direction with a slower speed $$v_2$$. He puts on brakes and gives his train a constant retardation $$a$$. Which of the following option is correct :

(A) $$d\geq\frac{2(v_1 - v_2)^2}{2a}$$

(B) $$d >\frac{(v_1 - v_2)^2}{2a}$$

(C) $$d >\frac{2(v_1 - v_2)^2}{a}$$

(D) $$d \geq\frac{(v_1 - v_2)}{2a}$$

Note by Kshitij Johary
4 years, 3 months ago

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
• list
1. numbered2. list
1. numbered
2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$...$$ or $...$ to ensure proper formatting.
2 \times 3 $$2 \times 3$$
2^{34} $$2^{34}$$
a_{i-1} $$a_{i-1}$$
\frac{2}{3} $$\frac{2}{3}$$
\sqrt{2} $$\sqrt{2}$$
\sum_{i=1}^3 $$\sum_{i=1}^3$$
\sin \theta $$\sin \theta$$
\boxed{123} $$\boxed{123}$$

Sort by:

actually you did not complete the question. i suppose the original question was about avoiding the accident between the two trains , and in that case i find option (B) to be correct.

- 4 years, 3 months ago