A 2.2 ohm resistor has 0.042 A of current in it. What is the potential difference across the resistor?
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Answer:
Explanation:
27 cm = 0.27 m
As the blocks are hanging on 2 sides of the pulley, their difference in mass would generate a net force toward the heavier side:
Let g = 9.81 m/s2
F = g(2.7 - 1.4) = 9.81*1.3 = 12.753 N
This force would generate a torque at 0.27 m moment arm
T = F*r = 12.753*0.27 = 3.44 Nm
The moment of inertia of the solid disk:
Where m = 0.78 kg is the disk mass and R = 0.27 m is the radius of the disk.
So the angular acceleration of the torque is
So the linear acceleration is its angular component times radius