(part 1 of 2) An amusement park ride consists of a rotating
circular platform 10.2 m in diameter from
which 10 kg seats are suspended at the end
of 2.59 m massless chains. When the system
rotates, the chains make an angle of 36° with
the vertical
The acceleration of gravity is 9.8 m/s2.
What is the speed of each seat?
Answer in units of m/s.

(part 2 of 2)
If a child of mass 64 kg sits in a seat, what is
the tension in the chain (for the same angle)?
Answer in units of N.

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.

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it's a b and

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2