A person with a blackbelt in karate has a fist that has a mass of 0.47 kg. Starting from rest, this fist attains a velocity of 6.6 m/s in 0.24 s. What is the magnitude of the average net force applied to the fist to achieve this level of performance?

Question

anonymous · Answer

funny...goodbye

anonymous · Answer

So we define the force by Chuck Norris's fist as F_cn

F_cn = ma = ?
find a..

Kinematics Equation:
v_cn_final=v_cn_init+a*t

Solve this for a..
a = v_cn_final/t

take a  =>   put it in m*a...
and there you should have the flat out force in the x direction of Chuck Norris's fist.
Just fill in the variables with the numbers. If you want I can run the calc in a min if I can find my calcualor...

anonymous · Answer

Screw it, using my cell phone.. it's 12.925 Newtons. Should be anyway, assume cell phone is good to me.