serenityarts123
13.04.2020 •
Mathematics
7+3x=16
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lol ok let me see
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Ответ:
4. Before the dog jumps out, initial momentum=0
After the dog jumps out, final momentum=initial momentum=0
So dog's momentum+canoe's momentum=0
Dog's momentum=mass*velocity
=15*1.2
=18
Canoe's momentum= -(dog's momentum)= -18
Canoe's velocity=-18/40=-0.45m/s
The - sign means the direction is opposity to the dog's jump.
5. Assume the Pennridge player's direction is +ve
Initial momentum before collision=Pennridge player's momentum + Souderton player's momentum
=80*3+70*(-2.5)
=240-175
=65
As they are stuck together after collision, the final mass=80+70=150
Final momentum=Initial momentum=65
Final velocity=Final momentum/Final Mass
=65/150
=0.4333m/s in Pennridge direction