contestada

A 0.75 kg teddy bear is nudged off a window sill and falls 2.05 m to the ground. what is its kinetic energy at the instant it hits the ground?

Respuesta :

david8644

Answer:

V=6,342 m/s

Explanation:

In order to calculate the kinetick energy you need to multiply the speed by the mass of the object, to calculate the final velocity or t the point of impact you use the next formula:

[tex]V^2=2g*h\\v=\sqrt{2g*h} \\v=\sqrt{2*9,81*2,05}\\ v=\sqrt{40,221} \\v=6,342[/tex]

So the final velocity when the tedy bear hits the ground is 6,342 m/s.