How do you figure out escape velocity

Equation

KE. + PE. = KEf + PEf

By the time the Rocket reaches an infinete distance the KEf and PEf  power would be down to zero so then the equation will become KE. + PE. = 0

Cant explain much because dont know if this anserw recwires any speical things to solve it

we need to know the time interval during which the force acts. impulse of force = momentum change

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.