One 7.93 kg paint bucket is hanging by a massless cord from another 7.72 kg pain

Question

One 7.93 kg paint bucket is hanging by a massless cord from another 7.72 kg paint bucket, also hanging by a massless cord, as shown in Fig. 4 44. If the buckets are pulled up by an acceleration of 1.03 m/s2 by the upper chord, what is the tension in the top cord? A force of 45.24N is required to start a 7.28kg box moving across a horizontal floor. What is the coefficient of static friction between the box and the floor? A 13.27kg box is released on a 33 degree incline and accelerates down the incline at 0.21m/s2. What is the coefficient of kinetic friction? Suppose two boxes on a frictionless surface are connected by a heavy cord of mass 1kg as shown in Fig. 4-53. If box A has a mass of 10kg, box B has a mass of 12kg, and FP = 40N. What is the acceleration of box B? Ignore sagging of the cord. Suppose two boxes on a frictionless surface are connected by a heavy cord of mass 1kg as shown in Fig. 4-53. if box A has a mass of 10kg, box B has a mass of 12kg, and FP = 40N, what is the force, FBT, on the left box? Ignore sagging of the cord 121.74 Suppose two boxes on a frictionless surface are connected by a heavy cord of mass 1kg as shown in Fig. 4-53. If box A has a mass of 10kg, box B has a mass of 12kg, and FP = 40N, what s the tension, FTA, on the right box? Ignore sagging of the cord 20.8811.74

Explanation / Answer

12

perpendicular to incline force equation is given as

Fn = mg Cos33

frictional force is given as

Fk = uk Fn

Fk = uk mg Cos33

parallel to incline force equation is given as

mgSin33 - Fk = ma

mgSin33 - uk mg Cos33= ma

gSin33 - uk g Cos33= a
9.8 Sin33 - uk (9.8) Cos33 = 0.21

uk = 0.62

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