2. Suppose you have a one-dimensional collision with m1 = 450 g and m2 400. g. The initialvelocities are given to beVli 2.3 m/s, v2i -1.1 m/sand the final velocity of m2 is v2f = 1.2 m/s. What is the final velocity of mi?3. Is the collision in problem 2 elastic? You can determine this by calculating the initial andfinal total kinetic energies and seeing if they are the same, or by calculating the coefficient ofrestitution and seeing if it is equal to 1.

Question
Asked Oct 23, 2019
2. Suppose you have a one-dimensional collision with m1 = 450 g and m2 400. g. The initial
velocities are given to be
Vli 2.3 m/s, v2i -1.1 m/s
and the final velocity of m2 is v2f = 1.2 m/s. What is the final velocity of mi?
3. Is the collision in problem 2 elastic? You can determine this by calculating the initial and
final total kinetic energies and seeing if they are the same, or by calculating the coefficient of
restitution and seeing if it is equal to 1.
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2. Suppose you have a one-dimensional collision with m1 = 450 g and m2 400. g. The initial velocities are given to be Vli 2.3 m/s, v2i -1.1 m/s and the final velocity of m2 is v2f = 1.2 m/s. What is the final velocity of mi? 3. Is the collision in problem 2 elastic? You can determine this by calculating the initial and final total kinetic energies and seeing if they are the same, or by calculating the coefficient of restitution and seeing if it is equal to 1.

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check_circleExpert Solution
Step 1

Given:

For m1:

Mass = 450 g

Initial velocity = 2.3 m/s

Final velocity = ?

For m2:

Mass = 400 g

Initial velocity = -1.1 m/s

Final velocity = 1.2 m/s

Step 2

 

According to the law of conservation of momentum.

Total momentum bef...

m,v+m2v = mvif +M,v2g
where
m, and m, are the masses
Vand viare the initial and final velocity of mass m
V2and vyare the initial and final velocity of mass m,
plug in the values
450x 2.3+400x (-1.1)= 450 x vf +400x 1.2
595-480
450
115
450
=0.26 m/s
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m,v+m2v = mvif +M,v2g where m, and m, are the masses Vand viare the initial and final velocity of mass m V2and vyare the initial and final velocity of mass m, plug in the values 450x 2.3+400x (-1.1)= 450 x vf +400x 1.2 595-480 450 115 450 =0.26 m/s

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