What effect would moving a bike and riders center of mass up

What effect would moving a bike and rider\'s center of mass up or down have on the power required to pedal the bike uphill? What effect would moving a bike and rider\'s center of mass forward or back have on the power required to pedal the bike uphill?

Solution

>> When rider\'s center of mass is moved up, then the power required is more because, normal force increases on the rear wheels, and so friction force increase on the rear wheels, so more power is required.

>> When the rider\'s center of mass is moved backward then, more power is required as friction is more on rear wheels, s more power is required.