Question

a body mass 0.5kg strikes the ground with a Velocity of 20m/s. how much is the kinetic energy of the stone at the time of strike to the ground​

Answer 1

Answer:-

• Mass=m=0.5kg
• Velocity=v=20m/s

We know that

$\boxed{\sf K.E=\dfrac{1}{2}mv^2}$

$\\ \qquad\quad\sf\longmapsto K.E=\dfrac{1}{\cancel{2}}\times 0.5\times \cancel{20}^2$

$\\ \qquad\quad\sf\longmapsto K.E=0.5\times 10^2$

$\\ \qquad\quad\sf\longmapsto K.E=0.5\times 100$

$\\ \qquad\quad\sf\longmapsto K.E=50J$