If a object accelerates from rest, what will its velocity be after 12.3s if it has a constant acceleration of 4.6m/s2

As per the question, the initial velocity of a object[u] = 0

The acceleration of the object  

The time [t] = 12.3 s

We are asked to calculate the velocity of the object at that time.

From equation of kinematics we know that-

                         V = u+at   [Where v is the final velocity of the particle]

                             =0+4.6*12.3 m/s

                             =56.58 m/s       [ans]

dang that balls went far

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.