An adult A and a child Care pulling horizontally in opposite directions on a wagon. The wagon's mass is m, the adult's leftward force magnitude is FA and the child's rightward force magnitude
is Fc. The wagon accelerates to the right along the ground with no friction.
А
C
TAL

50 inches should be the resultant vector

true tan speed = ang vel x radius

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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.