3 years ago

a toy car has a 2.0 A current, and its resistance is 1.75 ohms. How much voltage does the car require

Physics

1 answer:

o-na [289]3 years ago

5 0

Answer:

the answer will be 24.40 ohms law

Explanation:

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Two workers are sliding 470 kg crate across the floor. One worker pushes forward on the crate with a force of 450 N while the ot

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Answer:

0.169

Explanation:

There are three forces acting on the crate along the horizontal direction:

- The pushing force of the first worker, F1 = 450 N forward

- The pushing force of the second worker, F2 = 330 N forward

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The crate slides with constant speed, so its acceleration is zero: a = 0. This means that we can write Newton's second law as

$\sum F = ma = 0\\F_1 + F_2 - F_f = 0$

The frictional force can be rewritten as

$F_f = \mu mg$

where

$\mu$ is the coefficient of kinetic friction

m = 470 kg is the mass of the crate

g = 9.8 m/s^2 is the acceleration due to gravity

Substituting everything into the previous equation, we find:

$F_1 + F_2 - \mu mg = 0\\\mu = \frac{F_1 + F_2}{mg}=\frac{450 N+330 N}{(470 kg)(9.8 m/s^2)}=0.169$

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Explanation:

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