v 0 = 0 {\displaystyle v_{0}=0} v = 6 m / s {\displaystyle v=6m/s} Δ x = 80 c m = 0.8 m {\displaystyle \Delta x=80cm=0.8m}
v 2 − v 0 2 = 2 a Δ x {\displaystyle v^{2}-{v_{0}}^{2}=2a\Delta x}
( 6 m / s ) 2 − 0 = 2 a ( 0.8 m ) {\displaystyle (6m/s)^{2}-0=2a(0.8m)} a = 22.5 m / s 2 {\displaystyle a=22.5m/s^{2}}
F = m a {\displaystyle F=ma}
F = ( 50 k g ) ( 22.5 m / s 2 ) {\displaystyle F=(50kg)(22.5m/s^{2})} F = 1125 N {\displaystyle F=1125N}
