Kinetic energy

How much work does an elephant do while moving a circus wagon 20 meters with a pulling force of 200N?

$$w=f\times d$$  

How much power is needed for an elevator to exert a force of 15,000N to go up 12m in 60s.

$$P=\frac{W}{t}$$                   $$W=f\times d$$  

A dog runs briefly with a speed of 12m/s.  Suppose the dog with a mass of 32 kg runs at this speed.  What is the dog’s kinetic energy? $$KE=\frac{1}{2}mv^2$$  

You go bowling with your friends. You use the 12 lbs bowling ball and throw it at a velocity 12mph. What would make the ball have more kinetic energy, if you increase the mass to 14 lbs or if you increase the velocity to 14 mph?

Where does the rollercoaster have the most Kinetic energy?