A vector, B, when added to the vector C=3î+4j yields a resultant vector which is in the positive y direction and has a magnitude equal to that of vector C. What is the magnitude of B?

resonant frequency

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

answer; how far out of place which the object finished relative to the starting location;