Eₖ = √1/2 mv²
Eₖ/v² = 1/2 m
2Eₖ/v² = m
mgh = 1/2 mv²
gh = 1/2 v²
2gh = v²
v = √2gh
= √2 × 10 N/kg × 2 m
= 6.324 ms⁻¹
m = 9.8/(6424)²
= 9.8/39.993
= 0.245 g
I am not sure if it's correct.
i transposed for m in the first equation then to find the velocity I combined the potential and kinetic energy equation. there was no mass because velocity doesn't depend on the mass
Then I used earth's gravitational field strength (g) 10 N/kg and the 2 m was the height provided in the question
you can try working and see if you get the same
I think it's B but I'm not to sure. hope that at least kinda helps.
D and E are the correct answers
I would say by using a telescope to look into the sky
Answer:
No.
Explanation:
No, I think the orientation was not the same 370 million years ago because 370 millions years ago there is a single super continent is present so with the passage of time, the super continent broken down into seven continents due to the activity of tectonic plates present inside the earth crust. So we can say that the orientation of east coast of United states were not the same 370 million years ago.
