The weight forces are internal to the system. O True O False

A bull shark has a reduced weight (or “submerged weight” = W - B) of 4Nin seawater and 12N in freshwater, i.e., as found in rivers (bull sharks have been known to swim into rivers from the ocean – including the Mississippi river!). How much more lift force needs to be generated when transitioning from sea to freshwater? Assuming that CL stays the same, calculate how much faster the shark has to go in order to swim horizontally in freshwater (i.e., relative to the swim speed in saltwater)?

Aording to a Simplificd model of a mamallian heart, at each Puise Approx 20g Of blood is accelerated from 0.23 m/S. T 0 0.34 m/S during a peried of • 09 8. What is The masnatude o the force exerted by heast Muscle?

A suspended mass of 20 grams located at  210°  in the force table is the same as:

A 70 kg bicyclist is riding her 15 kg bicycle downhill on a road with a slope of 80without pedaling or braking. The bicyclist has a frontal area of 0.45 m2and a dragcoefficient of 1.1 in the upright position, and a frontal area of 0.4 m2and a dragcoefficient of 0.9 in a racing position. If the downhill speed of the bicyclist(terminal velocity) can be determined when the total force acting on the “body” inthe direction of movement is equal to zero, determine the percentage of downspeed that she can be increased when she is in a racing position. Air temperatureis 150C and disregarding the rolling resistance and friction at the bearing.