Question

A 2kg body and a 3kg body are moving along the x-axis. At a particular instant, the 2 kg body is 1 m from the origin and has a velocity of 3m/s and the 3 kg body is 2m from the origin and has a velocity -1 m/s . find the position of the centre of mass.

Answer 1

The position of centre of mass is  (CM) = 8 / 5 cm.

Explanation:

We are given:

• Mass of body A = 2 Kg
• Mass of body B = 3 Kg
• Distance of 2 Kg body from origin = 1 m
• Velocity of body A = 3 m/s
• Distance of 3 Kg body from origin = 2 m
• Velocity of Body B = 1 m/s

To find:

Position of centre of mass = ?

Solution:

Centre of mass (CM) = M(A)V + M(B)V / M(A) + M(B)

Centre of mass (CM) = 2 x 1 + 3 x 2 / 2 + 3

Centre of mass (CM) = 2 + 6 / 5

Centre of mass (CM) = 8 / 5 cm

Thus the position of centre of mass is  (CM) = 8 / 5 cm.

Also learn more

The velocity of a body of mass 10 kg increases from 4 m/s to 8 m/s. When a force act on it for 2 seconds, find :

(a) What is the momentum before the force act?

(b) What is the momentum after the force act?

(c) What is the momentum gain in momentum per sec?

(d) What is the value of force?

https://brainly.in/question/123780

Answer 2

Answer:

8/5 m/s

Explanation:

the explanation of the person above is correct.