If you jump from a height of only 2m above the ground and land without bending your legs, the bones in your lower legs will break due to the compression they experience.

the tensile strength of bone is 100 x 106 n/m², and the total cross-sectional area of the bones in your lower legs is 50 mm².

(a) calculate the force that needs to be applied to the lower leg bones before they break.

(b) the bones in the lower leg are approximately 40 cm long. use the stress-strain
relationship to estimate how much the bones are compressed as they reach breaking
point. the young's modulus of bone is 1.6 x 1010 n/m². (8 points)

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

While you are driving in the lane next to the curb on a multi-lane road the car on your left suddenly moves toward you lane. they are about toy crash into your front fender. you

Avehicle accelerates from 0 to 30 m/s in 10 seconds on a straight road