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Biomechanics Key

# Biomechanics Key - 1 a)100N*m b)1667N c)3334N...

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1) a) 100 N*m b) 1667 N c) 3334 N d) Runner 1’s foot rotation is 50% runner 2’s foot rotation. Or runner 2’s foot rotation is twice that of runner 1. 2) B1 = 8N, B2 = 5N, Any justification that makes sense works for the third part of the question. 3) i) If the backback is cuboid in shape more of the mass is positioned farther away from the Center of Mass which increases the moment arm of the mass and increases the force the muscles have to produce to counteract that torque produced by the product of the mass of the books and the moment arm. ii) Student holding the bag 25 cm from midline: Torque = 25 cm 100 cm m × 10 kg × 9.81 N kg = 24.53 N m Student holding the bag 50 cm from midline: Torque = 50 cm 100 cm m × 10 kg × 9.81 N kg = 49.06 N m iii) By placing the heavy load on top of the head it lines it up directly (or very

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Biomechanics Key - 1 a)100N*m b)1667N c)3334N...

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