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Question
If the velocity of the bullet of a rifle is doubled then how many times will be its kinetic energy?
2 times
3 times
4 times
16 times
ANSWER : 3
Descrption
<p style="margin-left:0px;">If the velocity of the bullet of a rifle is doubled, its kinetic energy will be <strong>4 times</strong> greater.</p><p style="margin-left:0px;">The kinetic energy of an object is given by the formula:</p><p style="margin-left:0px;"><strong>KE = 1/2 * mv^2</strong></p><p style="margin-left:0px;">where:</p><ul><li>KE is the kinetic energy</li><li>m is the mass of the object</li><li>v is the velocity of the object</li></ul><p style="margin-left:0px;">As the mass of the bullet remains constant, doubling the velocity (v) will square the value of v^2 in the equation. Therefore, the kinetic energy will be multiplied by 2^2, which is equal to <strong>4</strong>.</p><p style="margin-left:0px;">So, if the velocity is doubled, the kinetic energy will increase by a factor of 4.</p>
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