Two trains of distance 100 km travelling towards each other at train a at 60 km/hr and train b at 40km/hr when a bird sitting on train a goes at a speed of 90km/hr starts moving towards train b from train a starts and comes back and forth. find the total distance travelled by the bird

force tends to be low and long diustance masses are high

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e/c, where e is its total energy

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.