Question

In: Physics

Block 1 (0.5 kg) travels with an initial velocity of [ 40i ] + [ 60j...

Block 1 (0.5 kg) travels with an initial velocity of [ 40i ] + [ 60j ] m/s and then collides with block 2 (0.5 kg) traveling with an initial velocity of [ -40i ] + [ -40j ] m/s.
After the collision, block 1 has a final momentum of [ 5i ] + [ -25j ] kg*m/s. Assume that no external forces are present and therefore the momentum for the system of blocks is conserved.

What is the initial momentum of block 1?
i +   j kg*m/s

Tries 0/3


What is the initial momentum of block 2?
i +   j kg*m/s

Tries 0/3


What is the total initial momentum of the system of blocks?
i +   j kg*m/s

Tries 0/3


What is the change in momentum for block 1? (notice that you are given the final momentum for block 1.)
i +   j kg*m/s

Tries 0/3


What is the change in momentum for block 2?
i +   j kg*m/s

Tries 0/3


What is the final momentum of block 2?
i +   j kg*m/s

Tries 0/3


What is the total final momentum of the system of blocks?
i +   j kg*m/s

Tries 0/3


What is the total change of momentum of the system of blocks?
i +   j kg*m/s

Tries 0/3

What are the initial kinetic energies of block 1, block 2, and the system of blocks?
Block 1:  J
Block 2:  J
System of blocks:  J

Tries 0/3


What are the final kinetic energies of block 1, block 2, and the system of blocks?
Block 1:  J
Block 2:  J
System of blocks:  J

Tries 0/3


What is the change in kinetic energy of the system of blocks due to the collision?

Solutions

Expert Solution

What is the initial momentum of block 1? 20i + 30 j kg*m/s

What is the initial momentum of block 2? -20i - 20j kg*m/s

What is the total initial momentum of the system of blocks? 0i + 10j kg*m/s

What is the change in momentum for block 1? (notice that you are given the final momentum for block 1.) 15i+55j kg*m/s

What is the change in momentum for block 2?
15i+55j kg*m/s

What is the final momentum of block 2?
-5i + 35 j kg*m/s

What is the total final momentum of the system of blocks?
0i + 10j kg*m/s

What is the total change of momentum of the system of blocks?
0i + 0j kg*m/s

What are the initial kinetic energies of block 1, block 2, and the system of blocks?
Block 1: 1300J
Block 2: 800J
System of blocks: 2100 J

What are the final kinetic energies of block 1, block 2, and the system of blocks?
Block 1: 650J
Block 2: 1250J
System of blocks: 1900 J

What is the change in kinetic energy of the system of blocks due to the collision? 200J

genius_generous answered 1 year ago
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