133 mi/h=59.5 m/s
F=m•Δv/Δt=12.8•59.5/0.1=7616 N
A man claims he can safely hold on to a 12.80 kg child in a head-on collision with a relative speed of 133. mi/h lasting for 0.100 s as long as he has his seat belt on.
(a) Find the magnitude of the average force needed to hold onto the child.
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