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The grey figure above is a uniform sheet. Find the location of its center of mass.

A 3 kg block is dragged over a displacement of 2 meters by a constant force P acting at an angle of 37o above the horizontal as shown.  The surface is rough, and a constant frictional force f  opposes the motion.  What work was done by the frictional force f during this displacement?

  Extra Credit for 5 pts):  A  light spring is placed between blocks of masses m1 and m2 on a frictionless surface, as shown.  The blocks are pushed together, compressing the spring a distance of 15 cm, and held there.  The blocks are then released from rest.  After the blocks lose contact with the spring ends, m1 has a speed of 3 m/s.  What is the force constant, k, of the spring?  Show and explain all work!

A 70-kg satellite circles planet Cruton every 7.1 hours in an orbit with a radius of r = 16 x 106 m.  What is the mass of planet Cruton? (Note: G = 6.67 x 10-11 Nm2/kg2)

 A 10,000-N shark is supported by a horizontal cable attached to a 6.0-m rod that can pivot at the base. The rod weighs 4000 N. Calculate the tension in the cable. (select closest answer)

Which instrument is used to measure the distance from incus to stapes footplate for selection of a prosthesis in stapedectomy?

In myringotomy procedures, what does “PE” stand for?

A spherical bathysphere has a diameter of 2.00 m.  It is submerged in the Dead Sea at a depth of 8.00 m.  What is the total pressure at this depth?  (ρsea = 1.24 g/cm3, Po = 1.013 x 105 N/m2). 

A gallon container is filled with gasoline.  If the temperature goes up by 45 oF, how many gallons are lost (spilled out)?   (The linear expansion coefficient of gasoline is α = 3.2 x 10-4 (oC)-1.   Note that 1 gal = 3.79 liters, and 1 liter = 10-3 m3)

What is the abbreviation for the following:   Tablespoon: Teaspoon: Microgram: Centimeter: