Question

Figure shows a block of mass m resting on a 20∘ slope. The block has coefficients of friction μs = 0.80 and μk = 0.47 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.0 kg.

a)

What is the minimum mass m that will stick and not slip?
Express your answer to three significant figures and include the appropriate units.
 
b) 
If this minimum mass is nudged ever so slightly, it will start being pulled up the incline. What acceleration will it have?
Express your answer to three significant figures and include the appropriate units.
т
200
2 kg

Image Transcription

т 200 2 kg

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Tagged in
Science
Physics

Friction