Momentum:

$\overline{){\mathbf{p}}{\mathbf{=}}{\mathbf{m}}{\mathbf{v}}}$

**(A)**

p_{i} = m_{1}v_{i1} + m_{2}v_{i2} = (2.10)(29.0) + (57.0)(0)

Block 1 of mass m_{1} = 2.10 kg, moves along a frictionless air track with speed v_{1} = 29.0 m/s . It collides with block 2, of mass m_{2 }= 57.0 kg, which was initially at rest. The blocks stick together after the collision.

A) Find the magnitude **p**_{i} of the total initial momentum of the two-block system.

B) Find the magnitude of the final velocity of the two-block system.

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