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3 years ago

10

Newton's second law is a major part of mechanics. However, it does have its limitations. Under what condition does the second la

w not apply. Explain when this would happen.

1 answer:

uysha [10]3 years ago

7 0

Answer:

It a major part of mechanics what do you think.

Explanation:

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A 6.00 kg object is lifted vertically through a distance of 5.25 m by a light string under a tension of 80.0 N. Find: (2 marks)

jeka57 [31]

Explanation:

It is given that,

Mas of the object, m = 6 kg

It is lifted through a distance, h = 5.25 m

Tension in the string, T = 80 N

(a) By considering the free body diagram of the object, the forces can be equated as :

$T-mg=ma$

$a=\dfrac{T-mg}{m}$

$a=\dfrac{80-6\times 9.8}{6}$

$a=3.33\ m/s^2$

Work done by tension, $W_t=F\times h$

$W_t=80\times 5.25$

$W_t=420\ J$

(b) Work done by gravity, $W_g=mgh$

$W_g=6\times 9.8\times 5.25$

$W_g=308.7\ J$

(c) Let v is the final speed of the object and u = 0

$v=\sqrt{2ah}$

$v=\sqrt{2\times 3.33\times 5.25}$

v = 5.91 m/s

Hence, this is the required solution.

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4 years ago

The loudness of a sound wave is most closely related to

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Shock waves music sound sonic boom

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3 years ago

This question kind of complicated for me

djyliett [7]

I'm pretty sure it's frying an egg because you can't un-fry the egg

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3 years ago

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Barnacles are a type of arthropod in the subphylum Crustacea, and are related to crabs and lobsters. Barnacles are exclusively m

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The answer is commensalism because commensalism is a relationship where an organism is benefitted and the other is neither benefitted nor harmed. The barnacle is being benefited and the whale is not being benefited or harmed.

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4 years ago

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Four bicyclists travel different distances and times along a straight path. Which cyclist traveled with the greatest average

riadik2000 [5.3K]

Answer:

The cyclist with the greatest average speed is Cyclist 4 with average speed of 4.5 m/s

Explanation:

Given;

Cyclist 1 travels 9 m in 27 s

Cyclist 2 travels 87 m in 22 s

Cyclist 3 travels 106 m in 26 s

Cyclist 4 travels 108 m in 24 s

Determine the average speed of the cyclists as follows;

Average speed of Cyclist 1: v = 9/27 = 0.33 m/s

Average speed of Cyclist 2: v = 87/22 = 3.96 m/s

Average speed of Cyclist 3: v = 106/26 = 4.08 m/s

Average speed of Cyclist 4: v = 108/24 = 4.5 m/s

Therefore, the cyclist with the greatest average speed is Cyclist 4 with average speed of 4.5 m/s

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3 years ago