0 5 10 15 20 25 30 0 2 4 6 Time (s) X (m) 8
0 5 10 15 20 25 30 0 2 4 6 Time (s) X (m) 8
0 5 10 15 20 25 30 0 2 4 6 Time (s) X (m) 8
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P211 Final Sample 1<br />
5) Two masses are connected as shown in the figure. The system is released from rest and mass A<br />
falls to the floor through a distance of 1 m. The table and pulley are frictionless. What is the kinetic<br />
energy of mass A just before it reaches the floor?<br />
B<br />
<strong>10</strong> kg<br />
A<br />
2 kg<br />
1 m<br />
A) 2.21 J B) 3.27 J C) 5.00 J<br />
D) 19.6 J E) 39.0 J<br />
6) A 1 kg block slides on a fixed frictional surface, as shown in the figure below. The coefficient of<br />
kinetic friction is μ k = 0.90, and the slope angle is 60°.<br />
What is the magnitude of the acceleration of the block (parallel to the surface) if it is sliding<br />
downhill? Remember that sin(60°) = 0.866 and cos(60°) = 0.5 .<br />
A) 2.53 m/s 2 B) 9.81 m/s 2 C) 4.08 m/s 2<br />
D) 12.9 m/s 2 E) 7.82 m/s 2 Page 3
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