Two balls in a vaccum chamber are dropped simultaneously from different heights. which characteristic will be the same for both balls through out the motion?

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

the rearrangement of particles in a physical change. hope this

at right angles to each other