force and motion

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Block A, with a massof 50 kg, rests on a horizontal table top. The coeffcient of staticfriction is 0.40. A horizontalstring is attached to A and passes over a massless, frictionlesspulley. The smallest mass mB of block B, attached to the dangling end, that will startA moving when it is attached to the other end of the stringis:
I keep getting 30kg but the answer is 20kg

Answers (1)

  • Anonymous
    Rating:5 stars

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