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Block 1 has a mass of 0.35 kg and is on a frictionless surface. It has...

Block 1 has a mass of 0.35 kg and is on a frictionless surface. It has an initial speed of 1.2 m/s and it elastically collides with block 2 that was initially stationary. After the collision, the first block has a speed of 0.2 m/s in the opposite direction.

a) What is the speed of block 2?

b) What is the mass of block 2?

c) If the collision time was 0.002 s, what was the average force on block 1?

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