7. alice holds a black belt in taekwondo and her fist has a mass of 0.5 kg. her fist obtains a velocity of 5 m/s in 0.1 seconds from rest. evaluate the average net force applied to the fist.

25 N

Explanation:

the fist hit by the black belt Alice in the Taekwondo has been given to have a mass of 0.5 kg which acquires a velocity of 5 m/s in a time of 0.1 sec, therefore, the average net force which is being applied to the fist can be calculated by the following method,

Given,   mass m=0.5 kg, velocity v=5 m/s, time t=0.1 sec

As we know that, acceleration

Thereby,

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it has to be b, about 97 percent.