Elastic Collisions Video Lessons

Example

# Problem: Block 1 of mass m1 = 2.10 kg, moves along a frictionless air track with speed v1 = 29.0 m/s . It collides with block 2, of mass m2 = 57.0 kg, which was initially at rest. The blocks stick together after the collision.A) Find the magnitude pi of the total initial momentum of the two-block system.B) Find the magnitude of the final velocity of the two-block system.

###### FREE Expert Solution

Momentum:

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

(A)

pi = m1vi1 + m2vi2 = (2.10)(29.0) + (57.0)(0)

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###### Problem Details

Block 1 of mass m1 = 2.10 kg, moves along a frictionless air track with speed v1 = 29.0 m/s . It collides with block 2, of mass m= 57.0 kg, which was initially at rest. The blocks stick together after the collision.

A) Find the magnitude pi of the total initial momentum of the two-block system.

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