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An arrow in a bow has 70 J of potential energy. Assuming no loss of energy due to heat, how much kinetic energy will it have after it has been shot?

A) 140 J
B) 70 J
C) 35 J
D) 0 J
E) 50 J

Respuesta :

Answer:

option B

Explanation:

given,

Potential energy of the arrow = 70 J

There is no loss of energy .

Kinetic energy = ?

According law of conservation of energy total energy of the system remain conserved.              

The energy can change it's form or can transfer form from one system to another.            

Here the potential energy of the arrow will completely convert into Kinetic energy.                            

Hence, Kinetic energy = 70 J

The correct answer is option B

snehashish65

The kinetic energy of the arrow after it is being shot is 70 J. Hence, option (B) is correct.

Given data:

The magnitude of potential energy is, U = 70 J.

Since, it is given that there is no net loss of energy, which definitely in accordance with the conservation of energy. As per the law of conservation of energy, "The total energy of the system remain conserved. The energy can change it's form or can transfer form from one system to another".

So, the entire potential energy of the arrow will get converted into the kinetic energy. That is,

U = KE

KE = 70 J

Thus, we can conclude that the kinetic energy of the arrow after it is being shot is 70 J.

Learn more about the conservation of energy here:

https://brainly.com/question/15707891            

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