Problem 7.4 Part A Block A in (Figure 1) is heavier than block B and is sliding

Question

Problem 7.4 Part A Block A in (Figure 1) is heavier than block B and is sliding down the incline. All surfaces have friction. The rope is massless, and the massless pulley turns on frictionless bearings. The rope and the pulley are among the interacting objects, but you'll have to decide if they're part of the system Draw a free-body diagram for the block A Draw the vectors starting at the black dot. The location and orientation of the vectors will be graded. The length of the vectors will not be graded. + add element vector sum delete elemen attributes reset ? help A. Figure 1 # of 1 k A B on A Submit My Answer Give Up Incorrect; Try Again; 6 attempts remaining

Explanation / Answer

in vertical,

ay = Fy / m = (8 - 0.520x9.8) / 0.520 = 5.57 m/s^2

y = v0y t + ay t^2 / 2

20 = 0 + 5.57 t^2 /2

t = 2.68 sec

in horizontal,

d = 2.5 t = 6.70 m

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