Un bloque con una masa de 2.6 kg está unida a un resorte horizontal con constante elástica k = 6.7x102 N/m. Si el bloque se jala hasta 41.2 cm y se suelta, ¿cuál es la variación de energía potencial elástica? Despreciar la fricción entre la superficie y el bloque

U = 56.86 [J]

Explanation:

Para solucionar este tipo de problemas debemos calcular la energía potencial elástica debido al estiramiento del resorte.

U = 0.5*k*(x)^2

does anyone know or what?

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.