5. The velocity of a particle in reference frame A is (2.0iˆ+3.0jˆ)m/s. The velocity of reference frame A with respect to reference frame B is 4.0kˆ m/s, and the velocity of reference frame B with respect to C is 2.0jˆm/s. What is the velocity of the particle in reference frame C?

the independent variable, or the one that is intentionally manipulated is the speed.

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.