Ididnt understand this question . could someone me ?

Explanation:

decelation =5m/s

u=25m/s

v=0m/s

t=?

then;a=(v-u)/t

t=(v-u)/a

but decelation is negative of acceleration

t=(0-25)/-5

t=5s

to find distance

s=ut+1/2at^2

s=25*5+1/2(-5)5^2

s=62.5m

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.