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NOTE SHEET TEST 3 - TL-A)if collision perfcly elastic,whats...

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56) A 20g ball fired horiz with speed Vo twd 100g bal hangin still from string. elastic collision, 100g ball swings out to angle 50 degrees, find Vo. 44) 1000kg safe 2m above spring, rope breaks compresses spring 50cm. Find spring constant. 20) How far must you stretch a spring with k=1000 to store 200j of energy. 16) a 10 cm long string attached to ceiling. when 2kg mass is hung from it, spring stretches to 15cm. A) find spring constant, B) how long is spring with 3kg? TL -A)if collision perfcly elastic,whats balls spd aftr coll? B)Whats max comprression?C) repeat parts ab for inelastic collision. BelowLft -A package mass m releasd frm rest slids dwn from 3m hits mass 2m(at rest)A) stick together(inelasic) what is common spd?B)elastic collision what height of mass m rebound? find y4..
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30)How much work does elevator motor do to lift a 1000kg elevator height of 100m. 41) A 1000kg elevator accels up 1m/s for 10m. how much work does gravity do? Tension? Also find KE of elevator as it reaches 10m.whats Vf?
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