Give step-by-step calculation and explanation 7. A cylindrically shaped piece of collagen (a substance found in the body in connective tissue) is being stretched by a force that increases from 0 to 3.0 x 10-2 N. The length and radius of the collagen are, 2.5 cm and 0.091 cm, respectively, and Young's modulus is 3.1 x 106 N/m². a. If the stretching obeys Hooke's law, what is the spring constant k for the collagen? b. How much work is done by the force that stretches the collagen? (Hint: The potential energy due to a varying force from 0 to 3.0 × 10-2 N is given by U = - kx².)

Give step-by-step calculation and explanation 7. A cylindrically shaped piece of collagen (a substance found in the body in connective tissue) is being stretched by a force that increases from 0 to 3.0 x 10-2 N. The length and radius of the collagen are, 2.5 cm and 0.091 cm, respectively, and Young's modulus is 3.1 x 106 N/m². a. If the stretching obeys Hooke's law, what is the spring constant k for the collagen? b. How much work is done by the force that stretches the collagen? (Hint: The potential energy due to a varying force from 0 to 3.0 × 10-2 N is given by U = - kx².)