Posted by **valentino anthony** on Sunday, January 22, 2012 at 1:20am.

a ball of mass 8kg falls from rest from a height of 100m.neglecting air resistance,calculate its total energy after falling a distance of 40m

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**drwls**, Sunday, January 22, 2012 at 3:05am
Assuming that potential energy is defined so that the value at ground level is zero, the total kinetic energy starts at M*g*H and remains that value until it hits the ground. Potential eneergy is changed to kinetic as it falls.

M = 8 kg

g = 9.8 m/s^2

H = 100 m

Total energy = ____ J

(Just multiply the three numbers)

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**Ode francis**, Tuesday, February 21, 2012 at 5:07pm
7840

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**Olorunsola Ademola**, Sunday, April 22, 2012 at 4:44pm
Datas.mass=8kg,height=100m,distance=40m.And the question state find the total energy,so the addtion of kinectic & potential energy is the total energy. Ep=m*g*h.while g is constant at 10m/s^2.Ek =1/2 m*v^2.distance wil be represent velocity, so v=4om.after that add both answer 2gether.the answer is our total energy

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**ogala ojo**, Thursday, December 5, 2013 at 9:28am
E.p is equal to mgh

8 mutiply by 10 multiply by 100 is equal to 800joules

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**Ubong U.**, Wednesday, March 12, 2014 at 6:08pm
This question is just straight forward. We know that it all about EK and EP but it common sense to answer this question. It says

8kg falls from rest and

the height is 100 m

Neglect air resistance and calculate the total energy after falling a distance of 40 m.

Fall from rest _ 8*100= 800.

Total energy after falling is 40 *100=4000.

Then you add the both answers together, that is falling from rest * total energy after falling, which is; 800 + 4000 = 4800joules...

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**Uhuo**, Friday, June 26, 2015 at 3:32am
Its k.E= 0.5*m*v^2 while v^2 =2gh/2gh. Therefore k.E = 0.5*8* 44.7^2 =

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