I 2. Two girls are sitting on the same side of a see-saw. One girl is 28 kg and sitting 2.4 m
away from the middle. The other girl is 35 kg and 2.6 m away from the middle. Their dad
can balance them out if he sits 2.0 m away from the middle on the other side. What is their
dad's mass?

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.

higher potential

explanation:

because it is in a high speed so it must move into a of high potential

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle