Arunning cheetah begins to slow down. for each meter the cheetah travels, its speed changes by −3.4 kilometers per hour. the cheetah travels a total of 21.5 meters. what is the total change in the cheetah's speed during this time? drag and drop the correct answer into the box. 73.1. 71.9. -71.9. -73.1.

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

95.03 is the answer. hope this !