I dont get gravity...im just curious?

Question

Galileo proved that if you drop 2 objects of different mass and/or size, at the height, they would hit the ground at the same time. All objects with matter has a gravitational pull, and the force of the pull increases as the mass of the object increases. wouldn't that mean that the heavier object hits the ground first?

Answer 1

because the resultant force!!! all objects will fall at the same rate that is 9.8 m/s/s. because of the air resistance, the resultant force have changed. F=ma...... a=F/m

for example 2 balls with mass 3kg and 5kg respectively. AND the air resistance is 10N

weight of balls : 30N and 50N respectively

resultant falling force = (30-10)N and  (50-10)N

new acceleration, a=F/m    = 20/3     and 40/5

that is it! gravity!!

Answer 2

it depends on the ratio of the surface area to the weight

Answer 3

I think it means that the larger object has a larger gravitational pull, but when we're discussing large in this sense, we're talking planet sized. The bowling ball and the ping pong ball fall at the same rate because their size isn't significantly different enough to cause a difference in gravitational pull.

Answer 4

Yes, I see what you are trying to say.  The object with more mass does experience "more pull".  The thing is, that the more mass an object has, the harder it is to get moving quickly [accelerate].   It's called inertia.  Newton described it in his Laws of Motion as

Force = mass * acceleration.  

Another way to write that would be to say that

acceleration = force/mass

When the mass increases, the force of gravity goes up by the same proportion and the acceleration stays the same.

Answer 5

Yeah, Galileo proved that if you dropped two objects of different mass and/or size, at the same height, they would hit the ground at the same time which is the conventional 9.8m/s downward force. I thought that rule would be broken from the rule that all objects with matter has a gravitational pull, and the force of the pull increases as the mass of the object increases, but it was explained to me that the ONLY applies in space. Also the whole fact of friction in air would also mess around with that rule thus making the universal 9.8m/s. The rule can only be broken if you apply force to the drop.(eg. throwing down) Hope this mouthful helps ; )

Answer 6

it keeps our feet on the ground...lol