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Newton of motion
Initial k.e = ½*20*4*4 = 160j Final k.e = 2*160 = 320j Final Velocity = √(2*320)÷20 = √32 m/s = 5.66m/s Ft = m(v-u) t = 20(√32-4)÷5 t = 6.64s
Initial k.e = ½*20*4*4
= 160j
Final k.e = 2*160
= 320j
Final Velocity = √(2*320)÷20
= √32 m/s
= 5.66m/s
Ft = m(v-u)
t = 20(√32-4)÷5
See lesst = 6.64s