An object is located 10.0 cm from a convex mirror. The magnitude of the
mirror focal length is 15.0 cm. What is the image distance? Use the equation
df
d-f
A. -30.0 cm
B. 6.00 cm
C. 30.0 cm
D. -6.00 cm
SUBT

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.

i already answered it by 34/s