I want to ask about free fall issue.?

Question

If I have an object of 1000 kilogram mass ( 1 ton )
what will be the force that this object will effect on the earth if it free fall from 5 m height
thanx

Answer 1

(1000kg is not a ton, it is called a tonne or metric ton)

The object of 1000kg will have a force of acceleration on it of about 9.8m/s² during its fall of 5m.

To find the kinetic energy Ek that it will have at the end of its fall you just need to find its gravitational potential energy at the beginning of the fall. By the end of the fall all the gravitational potential energy will have turned into kinetic energy.

Ug=(m)(g)(h)

Ug is grav. potential energy, m is mass, g is acceleration due to gravity, h is height

Ug=(1000)(9.8)(5)
Ug=49,000 Joules

So our Ek is also 49,000 Joules.

The object will land on the earth with 49,000 Joules of kinetic energy.

Near the earth's surface, the object will have a force towards the earth of
f=ma
f=(1000kg)(9.8m/s²)
f=98,000N

At the time of impact the composition of the earth will determine how much force the 1 tonne mass imparts on the earth. If it lands somewhere soft where it can dig in far its kinetic energy will be eaten more slowly because it is pushing on the earth with a smaller force, if it lands somewhere very hard then the Ek will be eaten up very quickly as it will decelerate very quickly by imparting a large force on the earth.

Answer 2

First of all, this has nothing to do with freefall.

I wonder whether you are talking about the force of the impact when such an object hits the earth after falling 5 metres? If that is the question that you are really asking, then you need to calculate the amount of energy the object will have just prior to impact and then you need to know how far the object sinks into the earth's surface after impact.

The object at 5m has potential energy = mgh = 1000x9.8x5

= 49,000J

Now this energy is transferred into the work done as the object impacts the earth. Let's say it sinks one metre into the ground, then:

49,000 = Fxs = work done. If s = 1, then the Force of impact on the earth is 49,000 Newtons. If it only sinks 0.5m into the earth, the Force of impact is 98,000 Newtons.

Answer 3

Things that you don't understand doesn't mean it was some kind of US government conspiracy. The building collapsed because of the way it was constructed. The fireproofing insulation was blown off by the impact of the plane. The plane was at the beginning of a long flight so it was full of jet fuel. The towers did not collapse right away but many people were trapped on the upper floors because the fire blocked them from getting to the stairs or using the elevators. The exits and elevators were inadequate.

Answer 4

I think u wanted to ask a tough Q,, but u phrased it simpler...

Force....
that would be plainly 10,000N (assuming (g=10m/s^2), for simplicity...

U should have asked the IMPACT or IMPULSE exerted on the ground,, where the height, acceleration, Momentum, TIME of fall, and elasticity of the Ground and object would have all figured in.

Answer 5

The force will be 9,807 N, regardless of the height. The energy, however, will be 49,033 Joules, and the momentum will be 9,903 kg-m/s

Answer 6

f= ma

m= 1000kg
a=10m/s^2
f=10000 N

Answer 7

W=mgh
W= 1000kgx9.8m/s-2x5m
= 49 000N
this is the awnser

Answer 8

I think you are looking for the gravitational constant equation. wikipedia will have it. just search those words!