http://www.ck12.org Chapter 4. Newton’s Laws
Simulation
Ramp Forces and Motion (PhET Simulation)
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- Nathan pulls his little brother in a wagon, using a rope inclined at 30◦above the horizontal. The wagon and
brother have a total mass of 80 kg, the average coefficient of friction between the wagon wheels and the floor
is 0.08, and Nathan pulls on the rope with a force of 100 N.