A 2 kg block is moving along a oor with coecient of

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Unformatted text preview: system has A) increased B) stayed the same C) decreased Page 3 3m/s 1kg v 5. A 2 kg block is moving along a ﬂoor with coeﬃcient of kinetic friction µK = 0.2. It has an initial speed of 4 m/s. The block slows to a stop. 3 (a) Find the force of friction on the block. 4 m/s 2kg !K=0.2 3 (b) How far does the block slide before coming to a stop? 1m 3 6. A meterstick with weight mg = 1 N balances on two wedges as shown. What is the force exerted by the left wedge on the meterstick? Assume the center of mass of the stick is right in the middle. A) 0.375 N B) 0.5 N C) 0.625 N D) 1 N Page 4 1N 0.8m !"# \$ %&'()&*+,- . /,0 &1 2/(3%+ ! (4 4566 &'+/7 .8 , %(*3/ ,*7 9,.-/ ,4 4%&2*# :%/ 1&'9/ &* +%/ . /,0 .8 +%/ %(*3/ %,4 , </'+(9,- 9&06 &*/*+ +%,+ 054+ . /= 6. A horizontal beam of weight W is supported by a 3 7. A horizontal beam of weight W is supported by a ￿ hinge and cable as shown. If the hinge exerts a force F on the hinge and cable as shown. If the of F is hinge exerts a force F on ￿ beam, then the vertical component A) the beam,pointing upwards component of F is nonzero, then the vertical A) nonzero, pointing upwards B) nonzero, pointing downwards C) B) nonzero, pointing downwards nonz...
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