Two astronauts, each having a mass of 94.5 kg, are connected by a 10.0-m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.20 m/s. Treating the astronauts as particles, calculate each of the following.(a) the magnitude of the angular momentum of the system
(b) the rotational energy of the system
By pulling on the rope, the astronauts shorten the distance betweenthem to 5.00 m.
(c) What is the new angular momentum of the system?
(d) What are their new speeds?
(e) What is the new rotational energy of the system
(f) How much work is done by the astronauts in shortening therope?

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table

because growing process had stoped after 4-5 year

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.