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nydimaria [60]
3 years ago
13

What is the key external force that allows a man to push a wheelbarrow

Physics
1 answer:
ivolga24 [154]3 years ago
8 0

Answer:

Friction

Explanation:

The key and most important external forces that allows a man to push a wheelbarrow is frictional force.

Frictional force is a force that opposes motion and will bring it to a halt.

The reason why motion is possible is due to frictional force.

Without friction, a body will move and continue in motion infinitely. No one will be able to control motion.

  • Therefore, frictional force is an external force that will allow a man to push a wheelbarrow.
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Two large parallel conducting plates carrying opposite charges of equal magnitude are separated by 2.20 cm. Part A If the surfac
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Answer:

5308.34 N/C

Explanation:

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We know, from Gauss law for a thin sheet of plate that, the electric field at a point near the sheet of surface density 'σ' is given as:

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Now, as the plates are oppositely charged, so the electric field in the region between the plates will be in same direction and thus their magnitudes gets added up. Therefore,

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Now, plug in  47\times 10^{-9}\ C/m^2 for 'σ' and 8.85\times 10^{-12}\ F/m for \epsilon_0 and solve for the electric field. This gives,

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