When the net force acts at right angles to an object’s motion, what does it do to the object’s motion? a. it changes the object’s speed
b. it changes the object’s direction
c. it changes both the speed and direction of the object’s motion.

answer: the answer is a

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.

i think its c if i'm wrong