A 2.03 kg book is placed on a flat desk.  Suppose the coefficient of static friction between the book and the desk is 0.542 and the coefficient of kinetic friction is 0.294.  How much force is needed to begin to move the book and how much force is needed to keep the book moving at a constant velocity?

With the aid of a string, a gyroscope is accelerated from rest to 16 rad/s in 0.40 s.   What is its angular acceleration in rad/s2?   Approximately how many revolutions does it go through in the process?

What is the absolute pressure at a depth of 9.73 m below the surface of a deep lake?  Take 1.01 x 105 Pa as atmospheric pressure.

You spray your sister with water from a garden hose. The water is supplied to the hose at a rate of 0.111 liters per second and the diameter of the nozzle you hold is 5.79 mm. At what speed does the water exit the nozzle?

Which is true about elastic collisions:

An electric model train travels at 31.50 cm/s around a circular track of radius 1.670 m.  How many revolutions does it perform in one second?  How many radians per second is this?

A fluid, with a density of ρ = 1165 kg/m3, flows in a horizontal pipe. In one segment of the pipe the flow speed is v1 = 4.53 m/s. In a second segment the flow speed is v2 = 1.77 m/s. What is the difference between the pressure in the second segment (P2) and the pressure in the first segment (P1)?

Osmotic back pressure can be found by:

A squirrel runs along an overhead telephone wire that stretches from the top of one pole to the next. The creature is initially at position xi = 2.91 m, as measured from the center of the wire segment. It then undergoes a displacement of Δx = -5.61 m. What is the squirrel\’s final position xf?

A horizontal pipe carries a smoothly flowing liquid with density 1.25 × 103 kg/m3. At locations 1 and 2 along the pipe the diameters are 6.63 cm and 2.51 cm, respectively. Is the flow speed at location 2 higher or lower than at location 1?