QUESTION IMAGE
Question
what happens to the kinetic energy of a moving car if you doubled the mass of the car?
it will decrease by 2 times
it will increase by 4 times
it will increase by 2 times
Step1: Escribir la fórmula de la energía cinética
La energía cinética \( K \) de un objeto se calcula con la fórmula \( K=\frac{1}{2}mv^{2} \), donde \( m \) es la masa y \( v \) es la velocidad.
Step2: Analizar el efecto de duplicar la masa
Si la masa se duplica (\( m' = 2m \)) y la velocidad permanece constante (\( v'=v \)), la nueva energía cinética \( K'=\frac{1}{2}(2m)v^{2} \).
Simplificando \( K' = 2\times\frac{1}{2}mv^{2}=2K \).
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It will increase by 2 times.