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  3. a block with mass m1 = 8.7 kg is on an incline wit

A block with mass m1 = 8.7 kg is on an incline with an angle...

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Physics

A block with mass m1 = 8.7 kg is on an incline with an angle θ =38° with respect to the horizontal. For the first question there isno friction, but for the rest of this problem the coefficients offriction are: μk = 0.34 and μs = 0.374.

1) When there is no friction, what is the magnitude of theacceleration of the block?

2) Now with friction, what is the magnitude of the accelerationof the block after it begins to slide down the plane?

3) To keep the mass from accelerating, a spring is attached.What is the minimum spring constant of the spring to keep the blockfrom sliding if it extends x = 0.16 m from its unstretchedlength.

4) Now a new block with mass m2 = 14.8 kg is attachedto the first block. The new block is made of a different materialand has a greater coefficient of static friction. What minimumvalue for the coefficient of static friction is needed between thenew block and the plane to keep the system from accelerating?

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