A cruise missile is launched from a missile launcher. The momentum of the 1 point missile and the launcher is recorded both before and after the launch in
the table below. What is the momentum of the Launcher after the launch?*
Momentum of Cruise Missile and Launcher
Before
(kg•m/s)
0
After
(kg•m/s)
4,800
Missile
Launcher
0
?
-4,800 kg•m/s
0 -2,400 kg•m/s
O 0 kg•m/s
0 4,800 kg•m/s

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

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.