Figure 7-20a shows four situations in which a horizontal
Chapter , Problem 8(choose chapter or problem)
Figure 7-20a shows four situations in which a horizontal force acts on the same block, which is initially at rest. The force magnitUdes are F2 = F4 = 2Fl = 2F3 The horizontal component Vr of the block's velocity is shown in Fig. 7-20b for the four situations. (a) Which plot in Fig.7-20b best corresponds to which force in Fig. 7-20a? (b) Which plot in Fig. 7-20c (for kinetic energy J( versus time t) best corresponds to which plot in Fig. 7-20b?
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