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A particle with mass m1=250m1=250 g is moving with a velocity of v1=8.0v1=8.0 m/s. It collides...

A particle with mass m1=250m1=250 g is moving with a velocity of v1=8.0v1=8.0 m/s. It collides fully elastically with another particle with mass m2m2, which was initially at rest, and now it's velocity is u1=−3.0u1=−3.0 m/s. Find m2m2 (in grams).

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