woman making a verfical jump F N irm Cortana Ask me Solution

woman making a verfical jump F, (N) irm Cortana. Ask me

Solution

From the graph at t =0, the floor exerts an upward force on the lady to her weight

W= 600 N

=> m = 600/g = 600 / 9.81 = 61.2 kg

Impulse I=F_avgdt =change in momentum =dP =mdv
=>F(net)t =Area of the graph with the x-axis - impulse due to her weight

F(net)t= 600*0.2 + (1/2)*1800*0.35 + 600*0.35 +(1/2)*2400*(0.15) - 600*0.5 =525 N

=> mdv = 61.2[v - 0]

=> v = 525/61.2 = 8.58 m/s