Assume Youngs modulus for bone is 1.50 3 1010 N/m2. The bone breaks if stress greater than 1.50 3 108 N/m2 is imposed on it. (a) What is the maximum force that can be exerted on the femur bone in the leg if it has a minimum effective diameter of 2.50 cm? (b) If this much force is applied compressively, by how much does the 25.0-cm-long bone shorten?
Physics 2 for Engineering Week 10 Sources of Magnetic Field 2 B = μ 0 4π (q v x r) / r -7 μ0= 4 π x 10 Magnetic field due to a straight current carrying conductor at a point P along an axis perpendicular to length B = μ 0 / 2π x for a long wire a>>x Magnetic field of a wire 2 2 B = (μ 0 / 4π) (2a / x √(x +a )) Force between parallel conductors F’ = I’ L’ x B F’ / L’ = μ0I I’ / 2πr Field due to I, B = μ 0 / 2πr Lorentz Force Fm = q v x B = q v B sin θ = I L B sin θ τ = d x F = r m g Magnetic field on the axis of a circular current loop B = μ I a / 2(x + a ) 2 3/2 0 For x <