two pennies which falls to the ground at the same time but why?

Question

There are two pennies one on the ruler one in front of the ruler. you use the ruler to hit the penny in front of the ruler, and both pennies shoots out at the same time the penny that is hit by the ruler just drops straight down the other penny that was on the ruler flies out and shoots forward but both of the pennies dropped on the floor the same time
WHY?!!

Answer 1

Gravity is constant, there a physics saying for instance that goes, if you shoot a bullet straight out and drop a bullet at the same time they'll both hit the ground at the exact same instant. Essentially you, me and everything is falling at a constant rate of 9.8m/s towards the center of the earth. Without the floor to stop us down we'd go, and the moment you let the penny drop and the other one shoot forward they both begin to drop at the exact same rate of 9.8m/s regardless if one is also moving forward at the same time.

Answer 2

When you launch a projectile horizontally, it does not undergo an horizontal acceleration, but it does undergo a vertical acceleration that is the same as when the projectile is simply dropped.



If you are interested in the math, here you go:



For launches at an angle, the initial velocity has x and y components as:



Vx = Vcos(Θ) ; horizontal component

Vy = Vsin(Θ) ; vertical component



The equations below can be derived from the basic equations of motion.



Max height: Irrelevant for horizontal launch

h = Vy²/2g

h = v²sin²(Θ)/2g



Time in flight: same as dropped object

t = √2h/g ; this is a different equation on a trajectory



Horizontal distance:



d = Vcos(Θ)t ; this is a different equation on a trajectory

d = Vcos(0)t ; cos(0) = 1

d = Vt

d = V√2h/g



I cut out a lot of steps, but this should give you an idea.

Answer 3

I'm not entirely sure I understand the scenario, but I'll give it a shot.

Horizontal and vertical acceleration are independent of each other.

Ex. A bullet fired from a gun at the same time that a bullet is just dropped from someone's hand will both hit the ground at the same time.

Why? Gravity is the only vertical force acting on both (same magnitude on both).

Answer 4

because they both the same mass and are both falling at the same rate of 32ft per-second per-second. This was proven by Gallieo when he dropped a lead ball and a feather together they both hitthe ground at the same time

Answer 5

The horizontal motion is independent of the vertical one. Gravity operates vertically and so there is no difference between the vertical motion.

Answer 6

Because gravity attracts all objects equally, regardless of their horizontal velocity component.