A uniform circular disc of mass m and radius R is rotating with angular speed w about an axis passing through its center and making an angle 0 = 30° with the axis of the disc. If the kinetic energy of the dise is amw²R?, the value of a is (up to 2 decimal places).
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- The puck in the figure below has a mass of 0.192 kg. Its original distance from the center of rotation is 40.0 cm, and it moves with a speed of 75.0 cm/s. The string is pulled downward 15.0 cm through the hole in the frictionless table. Determine the work done on the puck. Hint: Consider the change in kinetic energy of the puck.A bowling ball, whose radius R is 11 cm and whose mass is 7.2 kg. rolls from rest down a plank whose length L is 2.1 m. the plank is inclined at an angle φ of 34 degrees to the horizontal. How fast is the ball moving when it reaches the bottom of the plank? please can you show the answer in hand written formPhysics word problem on energy/work/force:
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