The number of oscillations completed during 3.50 s interval.

Question

A 3.870 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is µ, = 0.655 and the coefficient of kinetic friction is = 0.355. At time t= 0, a force F = 15.3 N is applied horizontally to the block, State the force of friction applied to the block by the table at times = 0 and i> 0. Hsk 24.84 15.3 1>0 Incorrect Consider the same situation, but this time the external force F is 30.8 N. Again, state the force of friction acting on the block at times = 0 and r> 0. 107.15 1 = 0 Incorrect Incorrect

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Chapter 18, Problem 81AP

To determine

The number of oscillations completed during 3.50 s interval.

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A 3.870 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is µ, = 0.655 and the coefficient of kinetic friction is = 0.355. At time t= 0, a force F = 15.3 N is applied horizontally to the block, State the force of friction applied to the block by the table at times = 0 and i> 0. Hsk 24.84 15.3 1>0 Incorrect Consider the same situation, but this time the external force F is 30.8 N. Again, state the force of friction acting on the block at times = 0 and r> 0. 107.15 1 = 0 Incorrect Incorrect

3. . a)A box of mass "m" rests on a board that makes 0 angle with the horizontal. The upper end of the box is attached to a spring with force constant k "k". If the static friction coefficient between the box and the board is u, determine the spring's stretch amount in terms of mass, angle, force constant, friction coefficient and gravitational acceleration. b)Find the stretch of the spring in cm for m 2 kg, k = 100 N / m, µ = 0.25, and 0=53°.

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