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Homework Statement
A diver with a weight of 833 N dives from a boat with a mass of 375kg. If he leaves the boat with a velocity of 2.25m/s [W] after accelerating for 0.50s, what will be the final velocity of the boat?
The attempt at a solution
ad=Vfd-Vid/t
=2.25-0/0.5
ad=4.5m/s^2 [W]
Fg=mdg
833=m(9.8)
md=85kg
Fnet=mdad
Fg+Fd=mdad
833+Fd=-450.5
Fb+Fd=0
Fb= -Fd
Fb= 450.5N
Fb=mbab
450.5=(375)(ab)
ab=1.26m/s^2
ab=Vfb-Vib/t
1.26=Vf-0/0.50
Vf= 0.63m/s
Is this correct?
A diver with a weight of 833 N dives from a boat with a mass of 375kg. If he leaves the boat with a velocity of 2.25m/s [W] after accelerating for 0.50s, what will be the final velocity of the boat?
The attempt at a solution
ad=Vfd-Vid/t
=2.25-0/0.5
ad=4.5m/s^2 [W]
Fg=mdg
833=m(9.8)
md=85kg
Fnet=mdad
Fg+Fd=mdad
833+Fd=-450.5
Fb+Fd=0
Fb= -Fd
Fb= 450.5N
Fb=mbab
450.5=(375)(ab)
ab=1.26m/s^2
ab=Vfb-Vib/t
1.26=Vf-0/0.50
Vf= 0.63m/s
Is this correct?