Figure 2.7b graphs another run of the train. Find (a) the average velocity from O to (b) the average and instantaneous velocities from O to (c) the approximate instantaneous velocity at 6.0s and (d) the average and instantaneous velocity at =9.0s.
FIGURE 2.7 (a) (Example 2.2)(b) (Exercise 2.2)
Suppose the traffic light is hung so that the
tensions T1 and T2 are both equal to 80.0 N.
Find the new angles they make with respect
to the x-axis.
(By symmetry, these angles will be the same.)
Answer Both angles are 38.7
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