An eastbound car travels a displacement of 80.0 Km in 45 minutes. What is the velocity
1 answer:
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Answer:
The point at which the electrical potential is zero is x = +0.33 m.
Explanation:
By definition the electrical potential is:
Where:
K: is Coulomb's constant = 9x10⁹ N*m²/C²
q: is the charge
r: is the distance
The point at which the electrical potential is zero can be calculated as follows:
(1)
q₁ is the first charge = +3 mC
r₁ is the distance from the point to the first charge
q₂ is the first charge = -6 mC
r₂ is the distance from the point to the second charge
By replacing r₁ = 1 - r₂ into equation (1) we have:
(2)
By solving equation (2) for r₂:
Therefore, the point at which the electrical potential is zero is x = +0.33 m.
I hope it helps you!
Answer:
324.3Nm
Explanation:
The torque is given by the equation
in this case the vectors r and F are perpendicular between them, thus:
The forces acting on the mass are:
(1)
where T is the tension of the cable, M is the mass and a is the acceleration.
Furthermore, we have that the acceleration is:
By replacing in (1) we can obtain:
The force T produces the torque on the pulley, hence:
the answer is 324.4Nm
hope this helps!