What is meant by the centre of mass of body.

the center of mass is a position defined relative to an object or system of objects. it is the average position of all the parts of the system,weighted according to their masses. for simple rigid objects with uniform density, the center of mass os located at centroid.

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.