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MakcuM [25]
3 years ago
6

24 POINTS!!!!!!!!!!!!!!!!!!

Chemistry
2 answers:
Lemur [1.5K]3 years ago
7 0

F = (mass)(acceleration) = ma

m = 55 kg

Vi = 20 m/s

t = 0.5 s

Vf = 0 m/s (since she was put to rest)

a=(Vf-Vi)/t

a=(0-20)/5

a = 40 m/s^2 (decelerating)

F = ma = (55 kg)(40 m/s^2)

F = 2200 N

Hope this answer will be a good h<span>elp for you.</span>
GenaCL600 [577]3 years ago
3 0
 change of momentum =mv-mu=m(v-u)=55(0-20)=-1100
rate of change of momentum=-1100/0.5=-2200  this is equal to force applied.
so force=-2200 kg/m^2
negative sign shows force acts in opposite direction to motion.
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