Question

ab x x AA Paragraph Styles Dictate PRINCIPLE OF BIOMECHANICS QUESTION 3 (1) The tibia is the shin bone in humans. If the maximum strain it can experience before fracturing corresponds to a 1.1% change in length, what is the maximum force that can be applied to a tibia of cross-sectional area 2.9 cm before fracturing? Assume the Young's modulus for the tibia is E = 1.3 x 100 N/m2. Note: kN = kilonewtons. Select one: a. 94.5 kN b. 377.8 KN c. 4.1 kN d. 41.5 KN CA penguin slides across a sheet of ice at a constant velocity. Which of the following is true about the net force acting on the penguin? Select one: a. The net force is zero. b. The net force depends on distance travelled. c. The net force depends on the penguin's speed. d. The net force depends on the penguin's weight. (ii) An object of mass m accelerates with acceleration a. How does the acceleration change if we double the mass of the object and double the force causing the acceleration? Select one: a. The magnitude of the acceleration is halved. b. The acceleration remains unchanged. c. The magnitude of the acceleration increases by a factor of 4. d. The magnitude of the acceleration doubles.

Answer 1

Aus! Q.3 As we »A know Strees Forcé Young's modulus (E) = strain Anear AL Change in length L original length a) Force (Maximum) = EAAL 11% L 1.3 x 100 x 2.9x10 x (AL - FL HAL L = 41.5 KN Aug ii) As the Penguin Slides with constant velocity Hence Net Force = 0 Aus: alleration = 0. a ( a = F After 2F 2m m ad a= 2F = I=a zm Ans: - ② Remains unchanged. Please rate Thank you !!! it.