a stone is projected vertically upwards with a velocity of 20m/s two seconds later a second stone was similarly projected with the same velocity, when the two stones meet the second one is rising at a velocity of 10m/s , what is the length of time the second stone is in motion ,also find the velocity of the first stone when they meet​

nah.   i'm just sleepy.

the inner core.

good luck: )

klicker

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.