Question

7.
Two cars A and B move in mutually perpendicular directions as shown in
figure. Find VBA
3 m/s
B!
A
(a) 2 m/s
(c) 7 m/s
(b) 5 m/s
(d) 6 m/s​

Answer 1

Answer:

You haven't attached the figure nor have you mentioned the velocities of the two cars. Relative velocity can not be calculated until we know the individual velocities of the two cars.

Answer 2

The velocity of $V_{BA}$ is 5 m/s.

(b) is correct option.

Explanation:

Suppose,

The velocity $V_{A}=3 m/s$

$V_{B}=4 m/s$

We need to calculate the velocity of $V_{BA}$

Using formula of velocity

$V_{BA}=V_{B}-V_{A}$

$V_{BA}=\sqrt{V_{B}^2+V_{A}^2+2V_{A}V_{B}\cos\theta}$

Put the value into the formula

$V_{BA}=\sqrt{4^2+3^2+2V_{A}V_{B}\cos90}$

$V_{BA}=\sqrt{16+9}$

$V_{BA}=5\ m/s$

Hence, The velocity of $V_{BA}$ is 5 m/s.

Learn more :

Topic : velocity

https://brainly.in/question/10544414