Nt1310 Unit 6 Lab Report

Words: 417
Pages: 2

2. How fast would a 0.25 kg football have to be traveling to have the same momentum as a 0.05 kg bullet travelling 500 m/s?
Their momentum would be equivalent so
M1V1 = M2V2
0.25*v1=0.05(500)
V1=0.05(500)/0.25
V1=100ms
The answer = 100m/s

3. Sarah, who has a mass of 55 kg, is riding in a car at 20 m/s. She sees a cat crossing the street and slams on the brakes! Her seatbelt stops her from flying forward, bringing her to rest in 0.5 seconds. How much force did the seatbelt put on Sarah?
55(20) =F (0.5)
1100=0.5(F)
F=2200N

4. A big league hitter attacks a fastball! The ball has a mass of 0.16 kg. It is pitched at 38 m/s. After the player hits the ball, it is now traveling 44 m/s in the opposite direction. The impact lasted 0.002 seconds. How big of a force did the ballplayer put on that ball?
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0.16(38) +0.16(44) =f (0.002)
6.08+7.04=F (0.002)
13.12=F (0.002)
F=3530 N

5. Someone fires a 0.04 kg bullet at a block of wood that has a mass of 0.5 kg. (The block of wood is sitting on a frictionless surface, so it moves freely when the bullet hits it). The wood block is initially at rest. The bullet is traveling 300 m/s when it hits the wood block and sticks inside it. Now the bullet and the wood block move together as one object. How fast are they traveling?
0.04(300) =0.5+0.04v
12=0.24v
V=22.22m/s

6. Two kids are roller skating. Amy, with a mass of 55 kg, is traveling forward at 3 m/s. Jenny, who has a mass of 40 kg, is traveling in the opposite direction at 5 m/s. They crash into each other and hold onto each other so that they move as one mass. How fast are they traveling?
55(3) +40-(5) = (55+40)