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Activity9Newtons-fricFBDFeb19

# Activity9Newtons-fricFBDFeb19 - Activity 9 FBD Newton's...

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Activity 9 FBD Newton's Laws - Friction 2/19/07 M 1 = 1 kg M 2 = 3 kg Coefficient of kinetic friction between M 1 and the surface is 0.20. The pulley is massless and frictionless. Use g = 10 m/s 2 . Notes: Treat each block separately. What joins them is that they have the SAME acceleration (and velocity). The direction has to be consistent. If you choose to the right of M 1 along the surface to be positive, then the downward direction for M 2 needs to be positive. 1. Draw a FBD of all the forces acting on each block. 2. Redraw the diagram and simplify it. 3. Write out Newton's 2 nd law for EACH block SEPARATELY in each direction. 4. Solve equations. 1. Find the accelerations of the blocks. What is the tension in the string?

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37° 30° T 1 (100 N) T 2 (60 N) n (?) w (160 N) 2. Find the components of the forces that are not along the x- and y - directions. 2. Redraw the FBD showing all the forces (along the x- and y-direction).
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