Power:
P= A/t
A = F · h = m · g · h
P = m · g · h / t, m = 7.5 kg, g = 9.81 m/s², h = 8.2 m, t = 1800 s
P = 7.5 · 9.81 · 8.2 / 1800 = 0.335 W
Answer:
d=9.45 m
And directed
α=62.7⁰
Explanation:
The Pythagoras Theorem
"The theorem, also known as the Pythagorean theorem, states that the square of the length of the hypotenuse is equal to the sum of squares of the lengths of other two sides of the right-angled triangle"
so for this problem
And directed
α=tan⁻(8.4/4.33)
α=62.7⁰
Electrostatic forces between charges depend on the product of
the sizes of the charges, and the distance between them.
We should also mention the item about whether the charges are
both the same sign or opposite signs. That determines whether
the forces will pull them together or push them apart, which is a
pretty significant item.
You use the equation potential energy= mass x gravity x height. 10x2x9.8=196.