Negative because the graph goes down
Answer:
W = y (b-a) / ab
Explanation:
Work is defined by the expression
W = ∫ F. dr
In this case the force is in the same direction of displacement, so the scalar product is reduced to the ordinary product
W = ∫ F dr
The expression of the strength left is
F = -y / x²
let's replace and integrate
W = ∫ (-y / x²) dx
W = -y (-1 / x)
We evaluate between the lower limit x = b + a to the upper limit x = 0 + a
W = -y (-1 / b + 1 / a)
W = y (b-a) / ab
where (b-a) is the distance traveled
Explanation:
The magnitude of the net force can be found with Pythagorean theorem.
F² = Fx² + Fy²
F² = (1.06 N)² + (9.37 N)²
F = 9.43 N
The direction can be found with trigonometry (measured from the -y axis):
θ = atan(Fx / Fy)
θ = atan(1.06 / 9.37)
θ = 6.45°
Answer:
LED ligths produce less heat and more ligth.
Explanation:
Incandescent bulbs transform 88% of their energy in form of heat, but not in ligth, however LED ligth bulbs transform 88% of their energy in visible ligth (in particular visible wavelengths), so they are more eficcients.
