PHY 220 Laboratory Experiment 10 Prelab: CONSERVATION OF LINEAR MOMENTUM ii. Is
ID: 1792607 • Letter: P
Question
PHY 220 Laboratory Experiment 10 Prelab: CONSERVATION OF LINEAR MOMENTUM ii. Is the momentum of block B conserved during the collision? Explain your answer. exerts equai cunct opposite Force on tu other. This cau the momentum or each batt to (hange iv. Is the change in momentum of block B to the left, to the right, or zero? Explain your answer. v. Is the change in the momentum of block A greater than, less than, or equal to the change in the momentum of block B? Explain your answer. equal, the odiis exeqil cind opposite force on eaan other Now consider blocks A and B as a system. In the space provided at right, draw a free body diagram for the system of the blocks during the collision. (The dot given in the figure represents the system of the two blocks.) 2. System Is there a net force exerted on the system of blocks during the collision? If the net force exerted on the system is zero, state so explicitly. your reasoning. a. Explain On the basis of your answer above and Newton's second law (as written on the previous page), is the change in momentum of the system to the left, to the right, or zero? Explain your answer. b. What does this tell you about how the change in block A's momentum compares to the change in block B's momentum? c. Is this result consistent with your answer to question (v) in part 1d? If not, resolve the inconsistencies.Explanation / Answer
given collision between two masses ma and mb
before collision
speed of ma = vo
speed of mb = 0
after collision
velocity of ma = -v
velocity of mb = u = ?
iii) momentum of block B is not conserved during the collision as the block A exerts some force onthis block during collsion which is an external force, and in the presence of an external force the momentum is not conserved.
iv) as the block B was at rest before and after it moves to the right, its change in momnetum is to the right
v) as block A and B exert equal and opposite forces on each other, they end up imparting equal anbd opposite impulse to each other
hence change in momentum of block A is equal ( but opposite in sign) to the change in momnetum of block B
2.
a. For A and B blocks both to be part of the system, the collision force is then an internal force and hence there is no external force exerted on the system.
b. as net force is 0, net acceleration is 0 from newtons second law
hence change in momentum of the system is 0
c. as total change in momenetum of system is 0
hence change in momentum of block a is equal but opposite in siugn to change in momentum of block B
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