Why rolling friction less than sliding friction
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Ответ:
The force of friction depends on the area of contact between the two surfaces. As the area of contact is less in the case of rolling than in the case of sliding that's why rolling friction is less than the sliding friction. More the contact area more the friction.
Ответ:
150 = 0.5*6*v^2
v^2 = 50
v = 7.1m/s