A vase is being moved on a trolley. The coefficients of static and kinetic friction between the vase and trolley are

A small collar is attached to a spring and slides without friction along a circular rod in a vertical plane. The spring has an undeformed length of  and a spring constant of .  What is the potential energy stored in the spring when the collar is at point B?  Hint: convert inches to feet for consistent units! 

A rotating bike rack is shown below. What kind of motion do the following rigid bodies exhibit?  Link Type of Motion AB [pure_rotation] BD [curv_translation] Choose the appropriate answer from the dropdown menus.

A bucket full of ore is suspended from a traveling crane that moves along a stationary bridge. The crane is travelling at a speed of when it is brought to a sudden stop.  To what angle from the vertical would the bucket swing to before coming to an instantaneous stop?  Use . Enter a number correct to 2 decimal places with the angle specified in degrees.The answer will be between 20 degrees and 30 degrees.

A homogeneous sphere S, a uniform cylinder C, and a thin pipe P are in contact when they are released from rest on the inclined plane as shown in the figure below. All of the objects have the same mass . All three objects roll without slipping.  Use . What is the acceleration of the center of mass of the uniform cylinder C? 

A nozzle discharges a stream of water in the direction shown with an initial velocity of . What is the radius of curvature of the stream of water as it leaves the nozzle?  Use . Also, observe how the angle is given carefully and use the appropriate trigonometry term to solve the problem. Enter a number correct to 2 decimal places and in units of .The answer will be between and .

A printer head, represented by the red square on the figure below, follows a path in Cartesian space described by the equation .  When , the horizontal components of velocity and acceleration of the printer head are and respectively. What are the vertical components of its velocity and acceleration?

¿A qué hora vienes a la universidad?

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