Question

physics

Answer 1

Objects fall because the force due to gravity. Force due to gravity is a unique force because, it acts on everything that is on earth, it is also unique because nothing has to be in contact with it. It is a Non-Contact force.

Answer 2

thanks for helping me out. for the examle should i say something like we can observe motion in our daily life when we accidently drop something and so on....

Answer 3

yea

Answer 4

A few things come to mind

Galileo is supposed to have done a famous experiment, dropping different objects from the leaning tower of pisa, finding that different masses made the fall in the same time -

so even though more massive objects require a greater force to reach a given speed, gravity compensates for this exactly, by producing a force that is proportional to mass,

hence, as galileo found, all masses have the same acceleration under gravity.

Einstein found a beautiful explanation for this in his general theory of relativity, but that's another story.

Why does a feather take longer to fall ? Air resistance is messing things up - without air resistance everything falls at the same rate. It's kind of useful for parachutes though.
When you're falling with a parachute, the air resistance eventually balances the force of gravity so that you come down at a constant (safe) speed, instead of with constant acceleration that you would have without air resistance.

Another thing - the vertical fall is independent of the horizontal motion, so something that drops staight down should hit the ground the same time as something that starts out at the same time and place but with some sideways motion, another surprising thing, maybe.

All this stuff was quantified by Isaac Newton, who was born in the year that Galileo died, in his laws of motion, his universal law of gravity, oh yes, and he invented the mathematics that he needed as well (calculus), quite a smart guy !

Answer 5

thanks @profBrainstorm for this indepth information.

Answer 6

you're welcome