147. A 2.0-kilogram cart traveling north at4.0 meters per second collides head on with a1.0-kilogram cart traveling south at 8.0 metersiper second. What is the magnitude of the totalmomentum of the two carts immediately afterthe collision?(1) 0.0 kg m/s(2) 8.0 kg · m/s(3) 16 kg m/s(4) 32kg m/s

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Asked Dec 10, 2019
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147. A 2.0-kilogram cart traveling north at
4.0 meters per second collides head on with a
1.0-kilogram cart traveling south at 8.0 meters
iper second. What is the magnitude of the total
momentum of the two carts immediately after
the collision?
(1) 0.0 kg m/s
(2) 8.0 kg · m/s
(3) 16 kg m/s
(4) 32kg m/s
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147. A 2.0-kilogram cart traveling north at 4.0 meters per second collides head on with a 1.0-kilogram cart traveling south at 8.0 meters iper second. What is the magnitude of the total momentum of the two carts immediately after the collision? (1) 0.0 kg m/s (2) 8.0 kg · m/s (3) 16 kg m/s (4) 32kg m/s

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Step 1

Given,

            m1 = 2kg, v1 = 4m/s

            m2 = 1kg, v2 = -8m/s

The v2 has a negative sign because both the masses move in opposite direction.

Step 2

The initial momentum of the masses before collision is given by

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P;=m, v, +m,v2

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Step 3

Substituting the value gives t...

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P;= (2kg)(4m/s)+(1kg)(-8m/s) = 0kgm/s

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Collisions

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