PHY 2048 Midterm: 2048_Spring17_Exam2_Solution
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Exam 2 solutions: the figure shows an overhead view of three horizontal forces acting on a cargo canister that was initially stationary but that now moves across a frictionless floor. The x and y components of f2 and f3 cancel out, leaving only f1 as the net force. What is the object"s speed when it reaches x=5 m? (1) 8. 9 m/s (2) 0 m/s (3) 4. 5 m/s (4) 10 m/s (5) 18 m/s. Multiplying the acceleration a by the mass is equal to the force applied. So the integral (area) of the force with distance is the work done, which changes the kinetic energy: = 4 ma s v = 2k / m = 8a. Phy2048 spring 2017: the graph shows the potential energy of an object acted upon by a conservative force as a function of its position x. The potential values indicated are: ua = 20 j,
