B, the surface of a flat table.
<span>The person given credit for the first modern atomic theory was __________.
Dalton.</span>
Explanation:
answer 689910
M x G x H
mass = 77
G= 9.8
Meter = 915 this is the height
77 x 9.8= 754.6
754.6 X 915 = 689910 J
Answer:
A. The same amount
Explanation:
The acceleration at which objects free falls to the ground on Earth is constant and its value is always
, regardless of their mass (in this problem we neglect air resistance).
So, it doesn't matter if the two rocks are different or they are launched from different heights: their acceleration will be exactly the same.
This can be proved this way: first of all, the force of gravity exerted on every object is equal to the weight of the object,

where m is the mass of the object and g the acceleration of gravity.
However, we also know for Newton's second law that

where a is the acceleration of the object.
Combining the two equations,

So, the acceleration of an object in free fall is exactly the acceleration of gravity.
This is true since all matter contains some form of energy even just moving electrons and friction count as energy