Rachel is running at 5 m/s when she suddenly gets a cramp and slows down to 1 m/s. if her acceleration was -50 m/s^2, how long did it take her to slow down?

d = average v * t average v = (v1 + v2) / 2 = (5+1) /2 = 3 t = ∆v / a = (1-5) / -50 = 2/25 sec  d = 3 * (2/25) = 6/25 = 0.24 meter = 24 cm

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.

c) power lifting, will be your answer.

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deku ❤