Question

Bullet 2 has twice the mass of bullet 1. Both are fired so that they have the same speed. If the kinetic energy of bullet 1 is K, is the kinetic energy of bullet 2​

Answer 1

Answer:

2k is the kinetic energy of the bullet 2.

because the mass of the bullet 2 is exactly double of the bullet 1

Answer 2

Let the mass of bullet 1 be m

Then, the mass of bullet 2 will be 2m

$\sf{KE_1 = \frac{1}{2}mv^2} = K$

$\sf{KE_2 = \frac{1}{2}(2m)v^2}$

$\sf{KE_2 = 2(\frac{1}{2}mv^2)}$

$\sf{\large{\red{KE_2={\frak{2}{K}}}}}$