Questions 6-8 refer to the following graph and situation The graph above shows v

Question

Questions 6-8 refer to the following graph and situation The graph above shows velocity v as a function of time f for a 0.50-kg object traveling along a straight line. The graph has three segments labeled 1, 2, and 3. A rope exerts a constant force of magnitude F_T on the object along its direction of motion the entire time. During segment 2 only, a frictional force F_f is also exerted on the object. _____ Which of the following correctly ranks the displacement Delta x for the three segments of the object's motion? A. Delta x_3 > Delta x_2 > Delta x_1 > 0 B. Delta x_1 = Delta x_2 = Delta x_3 > 0 C. (Delta x_1 = Delta x_3) > Delta x_2 > 0 D. (Delta x_1 = Delta x_3) > 0 > Delta x_2 _____ Which of the following expressions correctly relates the magnitudes F_f and F_T? A. F_f

Explanation / Answer

6.) option A is correct

area under the curve will give us the diplacement during each segment

so x3>x2>x1

7.)option A is correct

friction force cannot be more than driving force if the body is in motion

8.)velocity become 8 m/s

kE = 0.5mv^2 - o.5mvi^2 = 0.5*0.5^64 - 0.5*0.5*4 = 3.75 J

option A is correct

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