Answer:
This is for all of the future students that have to do this assignment. I did the assignment and got my grade and one mistake. The answers below are all of the answers, I hope that this helps out anyone in the future! get your full marks •ᴥ• I hope you have a wonderful day
1.
M= 75kg
V= 18m/s
P = mv = (75) *(18) = 1350 kgm/s
2.
Bullet
P=mv = (.05)*(500m/s) = 25kgm/s
Football
V=p/m = 25kgm/s / 0.25kg = 100m/s
3.
Ft = ∆mv
F= mv /t = (55kg)(20m/s) / 0.5 s = 2200 N
4.
Ft = ∆mv = mvf – mvi = (.16kg)(38m/s) – (.16kg)(-44m/s) = 13.12kgm/s
F = ∆mv / t = 13.12kgm/s / .002s = 6560N
5.
P total before = p total after
Mv1 + mv2 = (M + m)v
(.04kg)(300m/s) + (0.5kg)(0m/s) = (0.04kg + 0.5kg) v
V = 22.22m/s
6.
P total before = p total after
Mv1 + mv2 = (M + m)v
(55kg)(3m/s) + (40kg)(-5m/s) = (55kg + 40kg) v
V = -0.37m/s
7.
P total before = p total after
Mv1 + mv2 = Mv1 + mv2
(8kg)(7m/s) + (2kg)(0m/s)= (8kg) v + (2kg)(12m/s)
V= 4m/s
8.
P total before = p total after
Mv1 + mv2 = Mv1 + mv2
(0.4kg)(18m/s) + (0.2kg)(0m/s)= (0.4kg) v + (0.2kg)(25m/s)
V= 5.5m/s
