Una mujer de 70 kg se balancea sobre uno de los tacones de sus zapatos. Si el tacón es circular con un radio de 0.4cm, ¿qué presión ejerce ella sobre el suelo?

Pressure,

Explanation:

Given that,

Mass of a woman, m =70 kg

She balances on one of the heels of her shoes. The heel is circular with a radius of 0.4cm. We need to find the pressure exerted on the ground. It is given by force acting per unit area. So,

So, of pressure is exerted on the ground.

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.