On a frictionless air track, a 0.150 kg glider moving at 1.20 m/s to the right collides with and sticks to a stationary 0.250kg glider. (a) What is the net momentum of this two glider system before the collison?
(b) What must be the net momentum of this system after the collision? Why?
(c) Use your answers in parts (a) and (b) to find the speed of the gliders after the collision.
(d) Is kinectic energy conserved during the collision?

answer: what are you talking about?

explanation:

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.

k2s for potassium sulphide