A constant force of 230 N is applied to a 24 kg block of concrete for 25 seconds. a. What is the final speed of the block if it originally at rest

Explanation:

a = f/m

a = 230/24 = 9.58m/s²

t = 25secs

u = 0m/s

v = ?

a = (v - u)/t

9.58 = (v - 0)/25

9.58 x 25 = v

v = 238.75m/s

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.