(adsbygoogle = window.adsbygoogle || []).push({}); Some Dynamics Questions

I've been working at these stupid questions for hours and i just can't figure them out. Someone please help.

1) A student is pushing horizontally on a table (m = 16kg) to move it across a horinzontal floor. The coefficient of kinetic friction between the table and the floor is 0.61

a) Determine the magnitude of the applied force needed to keep the table moving at a constant velocity.

b) If the applied force were 109N and the table were to start from rest, how long would the table take to travel 75cm?

2) A rope exerts a force of magnitude 21N, at an angle 31 degrees above the horizontal, on a box at rest on a horizontal floor. The coefficients of friction between the box and the floor are uS (Coefficient of Static Frict) = 0.55 and uK (coefficient of Kinetic friction) = 0.50. The box remains at rest. Determine the smallest possible mass of the box.

I'd need this help in less than an hour though, so Thanks

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# Homework Help: Some Drnamics Questions

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