3 years ago

If a = mg - kv²/ m find , correct to the nearest whole number the value of V when a= 2.8 ,m= 12 ,g = 9.8 and k= 8/3

Mathematics

2 answers:

xxMikexx [17]3 years ago

6 0

Answer:

Step-by-step explanation:

Harlamova29_29 [7]3 years ago

5 0

Answer:

v = 22.59

Step-by-step explanation:

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77julia77 [94]

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3 years ago

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What set does 30 belong to

docker41 [41]

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Step-by-step explanation:

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3 years ago

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saveliy_v [14]

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3 years ago

Use Hooke's Law to determine the work done by the variable force in the spring problem. A force of 450 newtons stretches a sprin

vlada-n [284]

Answer:

The work done is 202.50Nm

Step-by-step explanation:

Given

$F =450N$

$x_1 = 30cm$

$x_2 = 60cm$

Required

The work done

First, we calculate the spring constant (k)

$F = kx_1$

$450N = k *30cm$

$k = \frac{450N}{30cm}$

$k =15N/cm$

So:

$F = kx_1$

$F(x) = 15x$

The work done using Hooke's law is:

$W =\int\limits^a_b {F(x)} \, dx$

This gives:

$W =\int\limits^{60}_{30} {15x} \, dx$

Rewrite as:

$W =15\int\limits^{60}_{30} {x} \, dx$

Integrate

$W =15 \frac{x^2}{2}|\limits^{60}_{30}$

This gives:

$W =15 *\frac{60^2 - 30^2}{2}$

$W =15 *\frac{2700}{2}$

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$W =\frac{20250Nm}{100}$

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3 years ago

The ratio of child to teen to adult tickets sold at a water park on Saturday was 4 : 1 : 2. A total of 294 tickets were sold. Ho

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x=168

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3 years ago

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