Calculate the centripetal force (in N) on the end of a 57 m (radius) wind turbine blade that is rotating at 0.3 rev/s. Assume the mass is 6 kg.

Check image.

Explanation:

This is what my solution is, not a professional tutor so take my answer with a grain of salt and check.

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.