4. Statically Determinate Cedar Post Force and Displacement A post carrying a load of 36 kN is made of cedar and has a diameter of 90 mm. The soil provides a frictional resistance along the post’s length that varies linearly from w = 0 at y = 0, to w = 6 kN/m at y = 1.5 m. The Cedar modulus of elasticity is 6890 MPa. (a) Determine the force F acting at the bottom of the post to maintain equilibrium. (b) Determine the displacement of the top of the post relative to the bottom. You can neglect the weight of the post.

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1