rotational kinetic energy of it's particles
Answer:
(a) 172.185 N
(b) 
Solution:
As per the question:
Mass of the child, m = 22.0 kg
Angle, 
Now,
(a) The magnitude of the normal force exerted by the slide on the child:


Now,
(b) The angle from the horizontal at which the force is directed is:

Answer:
256.68m
Explanation:
that is the procedure above
Answer:
the correct answer is c, they will accelerate away from each other at different speeds. the 80kg will go faster due to less mass