The answer is B. Unbalanced force
Answer: C
produces as much as or more energy than it uses
Explanation:
This implies that the total energy used by the building is equivalent to the energy generated by the site
Answer:
He would throw the ball at a minimum distance because of gravity
Answer:
1) Unbalanced
2) Balance
3) Balanced
4) Unbalanced
5) Unbalanced
Explanation:
For 1 and 5, since the objects are not at a constant speed/velocity, their forces must be unbalanced.
For 2 and 3, their speeds are constant so that means the force is balanced. If the bycicle or box started accelerating, that would indicate an unbalanced force
For 4, the speed is constant, but it's direction is not indicating another unbalanced outside force causing it to turn. The force is unbalanced.
Answer:
5 m.
Explanation:
From newton's law of universal gravitation
F = Gmm'/r² ....................... Equation 1
Where F = Force between the giant lead spheres, r = distance between the spheres, mm' = product of their mass, G = universal constant.
Making mm' the subject of the equation
mm' = Fr²/G........................... Equation 2
Given: F = 0.010 N, r = 20 m
Substitute into equation 2
mm' = 0.010×20²/G
mm' = 4/G.
When the gravitational force between them is 0.16 N,
4/G = 0.16r²/G
Making r² the subject of the equation,
r² = 4/0.16
r² = 25
r = √25
r = 5 m.
Thus the distance is = 5 m.