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1 year ago

Pls help me solve these questions.

Physics

1 answer:

aliina [53]1 year ago

5 0

The value of constant in terms of Force, k, A, V and ρ is x = ln (F /kAρV ).

<h3>What is opposing force?</h3>

The force which tends to oppose motion of fluid in forward direction like shear stress in liquids and friction force in solids

A body moving through the air at speed V, experiences the retarding force.

Force = kAρVˣ

where A is the surface area, ρ is the density of air and k is the numerical constant.

Taking natural logarithm both sides,

ln F = ln (kAρVˣ)

ln F = x ln (kAρV)

x = ln F / ln (kAρV)

x= ln (F /kAρV )

x= ln F - ln (kAρV)

Thus, the value of constant is deduced in terms of Force , k, A, V and ρ.

Learn about opposing force.

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Answer : The correct option is, (D) A machine does 400 joules of work in 5 seconds.

Explanation :

Power : It is defined a the rate of doing work per unit time.

Formula used :

$P=\frac{w}{t}$

where,

P = power

w = work done

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Hence, the correct option is, (D)

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tensa zangetsu [6.8K]

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Explanation:

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3 years ago

Pls help me solve these questions.​

Pls help me solve these questions.