Physics

Kinetic energy measures the energy an object has due to its motion—it depends only on speed and mass, not on direction. Since the stone is moving at 10 m/s regardless of whether it's thrown horizontally or at an angle, you just need to plug the mass and speed into the kinetic energy formula $KE = \frac{1}{2}mv^2$. Watch out: convert the mass to kilograms first so your answer comes out in joules.

Kinetic energy measures the energy an object has due to its motion—it depends only on speed and mass, not on direction. Since the stone is moving at 10 m/s regardless of whether it's thrown horizontally or at an angle, you just need to plug the mass and speed into the kinetic energy formula $KE = \frac{1}{2}mv^2$. Watch out: convert the mass to kilograms first so your answer comes out in joules.