A projectile is launched horizontally at a speed of 45.0 m/s from a height of 65.0 meters.
What is the y-component of velocity of the projectile just before
it hits the ground?
9.81 m/s-
-29.4 m/s
45.9 m/s
0 65.0 m/s

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

there are no contact forces mentioned on the list of choices that you've provided.

conduct current i mean it makes sense