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Pepsi [2]
3 years ago
10

A light bulb uses 0.5 amperes from a source of 120 volts. How much power is used by the bulb? 

Physics
1 answer:
Sladkaya [172]3 years ago
8 0

Power = voltage(V) * current(I)

          = 120 * 0.5

Power = 60 watts

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A one-piece cylinder has a core section protruding from the larger drum and is free to rotate around its central axis. A rope wr
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Answer:

Magnitude the net torque about its axis of rotation is 2.41 Nm

Solution:

As per the question:

The radius of the wrapped rope around the drum, r = 1.33 m

Force applied to the right side of the drum, F = 4.35 N

The radius of the rope wrapped around the core, r' = 0.51 m

Force on the cylinder in the downward direction, F' = 6.62 N

Now, the magnitude of the net torque is given by:

\tau_{net} = \tau + \tau'

where

\tau = Torque due to Force, F

\tau' = Torque due to Force, F'

tau = F\times r

tau' = F'\times r'

Now,

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The net torque comes out to be negative, this shows that rotation of cylinder is in the clockwise direction from its stationary position.

Now, the magnitude of the net torque:

|\tau_{net}| = 2.41\ Nm

 

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