Question

A ball of mass m is thrown upward and another
ball of same mass is thrown downward so as to
move freely under gravity. The acceleration of
centre of mass is
(1) g
(3) 29
(4) Zero​

Answer 1

Answer:

zero...................................

Answer 2

Answer:

Acceleration of centre of mass, Acm = g

Explanation:

We know that, acceleration of centre of mass is given by the formula;

        Acm = a₁m₁ + a₂m₂ / m₁+m₂

(Note; Acm represents acceleration of centre of mass)

Putting the given values in the formula, we get;-

        Acm = mg + mg/ m + m

        Acm = m( 2g )/ 2m

        Acm = 2g/ 2

        Acm = g

Hope it helps! ;-))