Plz help

1 answer:

7 0

The answer to this is C

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Hi there!

This is an example of a recoil collision.

Using the conservation of momentum:

$p_i = p_f$

The initial momentum is 0 kgm/s (objects start from rest), so:

$p_f = 0$

We are given that the 15 kg block has a velocity of 12 m/s to the left, so:

$m_1v_1' + m_2v_2' = 0 \\\\15(-12) + 18v_2' = 0 \\\\$

Solve for v2':

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