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NeTakaya
3 years ago
9

If the kinetic energy of a given mass is to be doubled, its speed must be multiplied by

Physics
1 answer:
Tomtit [17]3 years ago
3 0

Answer:

Either B or D. The answer itself is 2.

Explanation:

The equation for the kinetic energy would be 1/2*mv^2.

When m is doubled, we can plug in 1 and 2 to compare our answers.

Plugging in 1 for mass would give us the answer 1/2*v^2.

Plugging in 2 for mass would give us v^2. This means that the velocity was multiplied by 2, meaning that the answer is it is multiplied by 2.

I am not sure which answer is correct since there seems to be two answer choices with 2 in it, but the answer is either B or D (I will call it ABCD because I do not want to cause confusion by saying 2 multiple times).

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Answer:

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Explanation:

It is given that,

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initial stretching in the spring, x = 5 m

Finally, it is stretched an additional 5 m i.e. x' = 5 m        

Let E is the elastic energy in the spring after Varg stretches the spring. it is given by :

E=\dfrac{1}{2}k(x+x')^2

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So, the elastic energy in the spring after Varg stretches the spring is 200 J. hence, this is the required solution.

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3 years ago
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The value of θ is 23.96°.
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Answer:

Explanation:

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