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4 years ago

Increasing sliding mass increases friction true or false

Physics

1 answer:

Vadim26 [7]4 years ago

5 0

True > the more mass increases more friction

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Why a pond of water appears shallower than it actually is?

GalinKa [24]

The refraction of light at the surface of water makes ponds look shallower then they really are

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3 years ago

Samuel adds a teaspoon of salt to a glass of water. He notices that the salt disappears . samuel takes a sip to discover that th

german

It is a Physical Change, because the water and the salt kept their original properties. I hope this helps! :) Have a great day!

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3 years ago

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If an object is moving and the forces acting on it are unbalanced in the direction of motion, the object will...

Scrat [10]

Answer:
The object will slow down

Explanation: if you are walking towards harsh wind, you will slow down because of the pressure pushing you.

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3 years ago

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Two very large parallel metal plates, separated by 0.20 m, are connected across a 12-V source of potential. An electron is relea

Semmy [17]

Answer:

${\rm K} = 2.4\times 10^{-19}~J$

Explanation:

The electric field inside a parallel plate capacitor is

$E = \frac{Q}{2\epsilon_0 A}$

where A is the area of one of the plates, and Q is the charge on the capacitor.

The electric force on the electron is

$F = qE = \frac{qQ}{2\epsilon_0 A}$

where q is the charge of the electron.

By definition the capacitance of the capacitor is given by

$C = \epsilon_0\frac{A}{d} = \frac{Q}{V}\\\frac{Q}{\epsilon_0 A} = \frac{V}{d} = \frac{12}{0.20} = 60$

Plugging this identity into the force equation above gives

$F = \frac{qQ}{2\epsilon_0 A} = \frac{q}{2}(\frac{Q}{\epsilon_0 A}) = \frac{q}{2}60 = 30q$

The work done by this force is equal to change in kinetic energy.

W = Fx = (30q)(0.05) = 1.5q = K

The charge of the electron is $1.6 \times 10^{-19}$

Therefore, the kinetic energy is $2.4\times 10^{-19}$

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4 years ago

A cyclist named Carly Daugherty accelerates from 0 m/s to 8 m/s in 3 seconds. What is her acceleration? Is this acceleration hig

Paraphin [41]

   Magnitude of acceleration =

   (change in speed) / (time for the change) .

Magnitude of Carly's acceleration =

   (8 m/s) / (3 sec) = 2-2/3 m/s²

Magnitude of Soul Train's acceleration =

      (30 m/s) / (8 sec) = 3.75 m/s² .

Soul Train's acceleration is about 41% greater than Carly's.

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3 years ago