A box with mass 13.0 kg moves on a ramp that is inclined at an angle of 55.0? above the horizontal. The coefficient of kinetic friction between the box and the ramp surface is ?k = 0.300. Choose the x-axis along the surface of the ramp and the y-axis perpendicular to the surface. A. Calculate the magnitude of the acceleration of the box if you push on the box with a constant force 180.0 N that is parallel to the ramp surface and directed down the ramp, moving the box down the ramp.
B. Calculate the magnitude of the acceleration of the box if you push on the box with a constant force 180.0 N that is parallel to the ramp surface and directed up the ramp, moving the box up the ramp.

force tends to be low and long diustance masses are high

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.

well clustered together.

points close on a scatter diagram