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m
100 kg
1.0m
10. The 100 kg block in the figure below takes 6.0 s to reach the floor after being
released from rest. What is the mass of the block on the left? The pulley is massless
and frictionless. (knight Exercise 7.25) (99 kg, also check problem 6 above)

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ignore the "figure 2". You do not need it to solve this problem. Thank you for your time!
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Refer to the picture below.
This is extra practice (not a grade) that I don't really understand.
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