if we drop two objects of different weight how come it reaches at same time?

Question

at the same time and same height

Answer 1

It can be considered this way:

The heavier weight is pulled more strongly by gravity, but its mass exhibits greater inertia. The lighter weight is not so strongly pulled by gravity, but its mass exhibits less inertia. The 2 precisely cancel in both to yield the same rate af acceleration.

Perhaps a more correct explanation requires an explanation of general relativity, but this one can be said to be accurate for the conditions you describe.

Answer 2

This is the fundamental law of physics: the acceleration of the falling objects is g (gravitational constant = 9.81 m/s^2). That follows from the second Newton's law. The gravitational force acting on the object is F = m*g. On the other hand every moving object has the acceleration a defined by the second Newton's law: m*a = F. Therefore for any free falling object the acceleration is always the same a = g independent of its mass m. Since the speed is the the first integral of acceleration it is also independent of m and is equal for any falling object. And finally since the path is the first integral of the speed it is also the same for any free falling object independent of its mass. Therefore different objects in free fall pass the same distance for the same time. For example if you left two different stones from the bridge they will rich the water at the same time.

Answer 3

The force of gravity on earth is 9.8m/s^2, weight is actually the mass of an object multiplied by the gravitational constant, but that is more or less irrelevant to the question. One of Newtons laws of motion states that an object will not change its acceleration unless acted on by outside forces, in this case gravity, here on earth we also have air resistance though. If you were in the middle of space far enough from any gravitational force, the object would remain at rest, if you dropped to objects on the moon were there is no air the only force is gravity and the objects would indeed hit at the same time. Sorry my thought process is kind of jumbled into a bunch of mush in this answer, I hope I sort of answered your question, I need to get to bed though.

Answer 4

Because gravity- ie the rate of acceleration of an object down through the air is constant. Weight is irrelevant to this

Every object is being pulled down at the same speed from 0 with the same acceleration.

BUT- there are factors like wind resistance. So a huge object might take longer to reach the ground because the wind resists its downward "flight" more

Answer 5

Because, even though the two objects have different masses, the force exerted on them by gravitational acceleration is proportional to their mass, so the acceleration is the same for both of them.

HTH ☺

Doug

Answer 6

For an interesting demonstration of this, please visit the following site: