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Nookie1986 [14]
3 years ago
10

Determine the energy lost, due to friction, as an 8000 N car that skids to a stop, if its initial velocity was 12 m/s.

Physics
1 answer:
chubhunter [2.5K]3 years ago
3 0

Answer:

<em>58,800Joules</em>

Explanation:

The energy lost is equal to the workdone by the car as it skids.

Workdone = Force * Distance

Given

Force = 8000N

Get the distance using the equation of motion

v² = u² - 2gS

0² = 12² - 2(9.8)S

-12² =  - 2(9.8)S

-144 = -19.6S

S = 144/19.6

S = 7.35m

Calculate the required energy

Workdone = 8000 * 7.35

Workdone = 58,800Joules

<em>Hence the energy lost due to friction is 58,800Joules</em>

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Which of the following wavelengths will produce standing waves on a string that is 3.5 m long?
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Answer

given,

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Pressure,P = 1 atm

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    P = 11.64 atm

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