An 8.0 kg object moving to the right at 6.0 m/s suffers a head on collision with a 4 kg mass moving at 9.0 m/s to the left. After collision, the 8.0 kg object bounces back at 4.0 m/s. Draw or describe a diagram that explains the situation. Determine the final velocity of the 4.0 kg object after collision.

it would be kevlar ^^

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.