gravational force?

Question

A 10kg iron ball and a 5kg iron ball have the same acceleration when dropped from rest from the same height because
1) action = reaction
2) the ratio of the gravitational force to mass is the same for both
3) the gravitational force is the same for both
Explain

Answer 1

Newton's Second Law for this situation is

F = mg

So the ratio of force to mass is F / m = g = the same for both falling masses.

Answer 2

The formula for the weight of a body is

Weight = mass x acceleration constant due to gravity

or acceleration constant due to gravity = Weight / mass

In other words, for any given mass, the ratio of its weight to the mass is always equal to the acceleration constant due to gravity.

Hence, the answer is (2): the ratio of the gravitational force to mass is the same for both

teddy boy

Answer 3

Choice 2. F = mg where m is the mass, g is the acceleration of gravity.
The force is higher for a heavier object, but the accleration is the exact same.
Therefore, the ratio of the force to the mass is the same.

Answer 4

2, because the force is not the same between the two masses and the earth like stated in number 3, because the acceleration is the same so mass times acceleration is different for two different masses. Answer one is just useless in all forms, and so number two is just mass times acceleration divided by mass which is just acceleration