Question

Four bodies of equal mass start moving with same speed as shown in the figure in which of following combination com will remain at origin

Answer 1

Answer:

A and C is the correct combination for centre of mass to be equal

Explanation:

In order to understand the question, first see the attached figure.

Now focus on the directions of all the four points;

A moves towards right/ y axis

B moves towards left/ y axis

C moves towards left/ y axis

D moves towards right

Now taking all the possible combinations given in questions, A and C is the correct combination for centre of mass to be equal.

Explanation;

For centre of mass to be equal, one movement should exactly counter/balance the other movement. When A moves toward right at a speed, then at same speed C moves towards left to keep distance and mass balanced

Answer 2

Answer:

for a and c the direction is opposite , therefore speed is negetive , hence a and c is the answer