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You have a lab setup to investigate rigid body rotation. A uniform disk of mass 1kg and radius 10cm can rotate around its center. It is accelerated by a string that is would around the outside of the disk and pulled on by a mass of 1/4 kg. (see sketch) You start the experiment from rest. Make a free body diagram for the pulling mass and a torque diagram for the disk. write the relevant newton's equation for linear and rotary acceleration. solve for the unknown accelerations and tension in the string. Recall the relation between angular and linear acceleration! After 0.5 sec by what angle has the disk spun and what is its angular speed at that moment.
A +4.5-µC charge experiences a 0.59 N force in the positive y direction. If this charge is replaced with a -1.0 µC charge, what force will it experience
In the figure below, water flows through a horizontal pipe, and then out into the atmosphere at a speed of v1 = 13 m/s. What is the gauge pressure in the left section of the pipe
During the pitching motion, a baseball pitcher exerts an average horizontal force of 274 Newton against the 0.158 kilogram baseball while moving it through a horizontal displacement of 1.3 meter before releasing it
If the focal length of lens is 0.67 m and the distance of the object is 120 cm. Find the distance of image and magnification
Jack and Jill exercise in a 25.0-m-long swimming pool. Jack swims nine lengths of the pool in 148.1 seconds (2 minutes and 28.1 seconds), while Jill, the faster swimmer, covers ten lengths in the same time interval. Discover the Jack average speed an..
Biological muscle cells can be thought of as nanomotors that use the chemical energy of ATP to produce mechanical work. How much work is done by such proteins
The average intensity of light emerging from a polarizing sheet is 0.707 W/m2, Find the angle that transmission axis of polarizing sheet makes with the horizontal
You are standing still, just to the side of a set of train trackers. A train passes by, moving at 25.0 m/s just as it passes by, it blows its whistle, Find the frequency of the sound you hear from the whistle
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, What is the work done by the field on the electron
A 140kg- tackler moving at 2.3 m/s meets head-on (and tackles) an 99 kg- halfback moving at 7.0 m/s. What will be their mutual speed immediately after the collision
A 250MW laser pulse is focused with a lens to a diameter of 2.0m. What is the laser beams electric field amplitude at the focal point
Nerve cells are long, thin cylinders along which electric disturbances (nerve impulses) travel. determine the magnitude of the charge density on the inner and outer cell walls
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