A cannonball is launched at an initial velocity of 50 m/s, at an angle of 40°.
A) What is its Y-component of velocity?
B) What is its X-component of velocity?
C) What is its maximum height reached?
D) What is the time to reach max height?
E) What is its total hang time?

( helppp i don’t understand this physics question ;-; )

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.