Answer:
3k mph
Explanation:
don't take my answer it is wrong
velocity of object just before hitting the ground = 10 m/s
10 m/sExplanation:
here's the solution : -
=》mechanical energy is always constant, when the object is at the top of the building , the object has potential energy but no kinetic energy,
so, at the top of the building the mechanical energy = potential energy = 100 J
but at when it is dropped from the building, the whole potential energy get converted into kinetic energy, just before reaching the bottom .
so, mechanical energy in the object just before hitting the ground = kinetic energy
( potential energy = 0 )
So, kinetic energy = 100 J
now, we know
![kinetic \: energy = \frac{1}{2} \times m {v}^{2}](https://tex.z-dn.net/?f=kinetic%20%5C%3A%20energy%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20%20%5Ctimes%20m%20%7Bv%7D%5E%7B2%7D%20)
=》
![100 = \frac{1}{2} \times 2 \times {v}^{2}](https://tex.z-dn.net/?f=100%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20%20%5Ctimes%202%20%5Ctimes%20%20%7Bv%7D%5E%7B2%7D%20)
( since, mass = 2 kg )
=》
![100 = {v}^{2}](https://tex.z-dn.net/?f=100%20%3D%20%20%7Bv%7D%5E%7B2%7D%20)
=》
![v = \sqrt{100}](https://tex.z-dn.net/?f=v%20%3D%20%20%5Csqrt%7B100%7D%20)
=》
![v = 10](https://tex.z-dn.net/?f=v%20%3D%2010)
so, velocity of object just before hitting the ground = 10 m/s
Answer: force, force
Explanation:
Newton’s third law states that there and equal and opposite force on an object.
I took the test as well
Answer:Frequency, Intensity, Time, Type
Explanation: frequency, intensity, time, and type is one way to remember the general guidelines for what should be included in a fitness plan.