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Plate sliding on ice with friction (Physics competition question)
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[QUOTE="jack action, post: 6850707, member: 240508"] No, 400 N is total rolling resistance + drag force. The drag force component would be entirely on the rear wheel. Assuming a rolling resistance coefficient ##C_{RR}##, a friction coefficient ##\mu##, a plate of weight ##W_p##, and a front wheel normal force ##N_f##, the horizontal forces acting on the top of the plate is ##C_{RR}N_f## and the static friction at the bottom of the plate is ##\mu (N_f + W_p)##. Even if the plate weight was very small compared to the front wheel's normal force, for the plate to move, ##C_{RR} \geqslant \mu##. This is a very unreasonable assumption, especially when ##\mu = 0.18##. [/QUOTE]
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Plate sliding on ice with friction (Physics competition question)
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