Question

two cars A and B are moving with same speed of 10 metre per second along the same line .what is the velocity of A related to B when they are moving towards each other​

Answer 1

Question

Two cars A and B are moving with the same speed of 10 metre per second along the same line. What is the velocity of A related to B. when they are moving towards eachother.

Given

• Two Cars A and B are moving with the same speed of 10 metre per second along the same line

Solution

$\sf \: v_{A}1 = v_{A} + a_{A}t$

$\sf \: 25 = 10 + a_{A}t$

$\sf \: a_{A}t = 15m/s ----- (1)$

$\sf v_{B}1 = v_{B} + a_{B}t$

$\sf \: v_{B}1 = 15 + a_{B}t - - - (2)$

$\sf \: x = v_{A}t + \frac{1}{2} a_{A} {t}^{2} = v_{B}t + \frac{1}{2} a_{B} {t}^{2}$

$\sf \: 10 + \frac{1}{2} a_{A}t = 15 + \frac{1}{2} a_{B}t$

$\sf a_{B}t = a_{A}t - 10 - - - - (3)$

From (1) k (3)

$\sf a_{B}t = 15 - 10 = 5m/s.$

from (2),

$\sf \: v_{B} = 15 + v_{B}t = 15 + 5$

= 20 m/s

Answer 2

Explanation:

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