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pochemuha
1 year ago
8

The two forces to the right are friction which one would be the force of kinetic friction?

Physics
1 answer:
xeze [42]1 year ago
8 0

Answer:

40 N

Explanation:

Both forces to the right are friction forces.  The 40 N force has to be the kinetic friction force because kinetic friction is always less than static friction.  So, the 80 N force has to be the static friction force, which is always greater than the kinetic friction.

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A metre rule is used to measure a length. Which reading is shown to the nearest millimetre? A 0.7m B 0.76m C 0.761m D 0.7614m
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~both of them show to the nearest metre.

~millimeter has (mm) unit eg 0.7mm

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How light is channelled down an optical fibre
coldgirl [10]

Explanation:

Suppose you want to shine a flashlight beam down a long, straight hallway. Just point the beam straight down the hallway -- light travels in straight lines, so it is no problem. What if the hallway has a bend in it? You could place a mirror at the bend to reflect the light beam around the corner. What if the hallway is very winding with multiple bends? You might line the walls with mirrors and angle the beam so that it bounces from side-to-side all along the hallway. This is exactly what happens in an optical fiber.

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3 0
3 years ago
A sound with an intensity greater than_____ dB can cause damage to human ears.
sergiy2304 [10]

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3 years ago
The magnitude E of an electric field depends on the radial distance r according to E = A/r4, where A is a constant with unit vol
Lesechka [4]

Answer:

\Delta V = 0.053 A

Explanation:

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E = \frac{A}{r^4}

as we know the relation between electric field and potential difference is given as

\Delta V = -\int E. dr

so here we have

\Delta V = - \int (\frac{A}{r^4}) .dr

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so we will have

\Delta V = 0.053 A

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