What is the first velocity of the car with one washer at
the 0.25 meter mark?
calculate the first and second velocities of the car with
one washer attached to the pulley, using the formulas
vi = 0.25 m/tı, and
u2 = 0.25 m/(t2-ti)
where t, and t2 are the average times the car took to
reach the 0.25 and the 0.50 meter marks. record these
velocities, rounded to two decimal places, in table e.
what is the second velocity of the car with one washer
at the 0.50 meter mark?
m/s

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.