Solved University-Physics Problems

Physics 1.-  Mechanics:   Uniform Circular Motion 

Javier Montenegro Joo


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  Uniform Circular motion.-  
  (1) A 10-cm diameter frictionless disk is rotating about its axis at 1000 rpm.  Suddenly while the disk is rotating, a particle located at a distance of half radius gets released and it is triggered. Determine the shooting speed of this particle.


The angular speed of the disk is the same at any radial distance, hence the initial velocity of the released particle is:


Physics Virtual Lab (PVL)  200+ Simulators

The Boom Crane simulation module is ideal to study torque. This module transports a random weight to a random position on the right-hand side of the crane and, the student must compute the equilibrating weight to be placed at a certain position on the other side.


[2] A 1.25 m diameter disk is rotating at 250 rpm. For a screw located at the edge of the disk, compute (a) tangential velocity (b) tangential acceleration (c) radial acceleration (d) Centripetal acceleration (e) frequency and period




  (3) Two wheels whose diameters are 40 cm and 60 cm, respectively, are on the same plane and they are separated. Both wheels are connected by a belt passing around their edges. Determine the angular velocity of the larger wheel when the smaller wheel rotates at 600 rpm. Calculate the distance traveled during 7.5 min by a point of the belt.


The tangential velocity of both wheels is the same, then:








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