A flat, spinning disc rotating at 20rad/s has a moment of inertia of 5kgm2 . A clay blob with a mass of 500g is dropped onto the rotating disc 35cm from the axis of rotation. As a result of the clay sticking to the disc, what is the new rotation rate of the disc-blob object?
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6. A flat, spinning disc rotating at 20rad/s has a moment of inertia of 5kgm2
. A clay blob with a mass of
500g is dropped onto the rotating disc 35cm from the axis of rotation. As a result of the clay sticking to
the disc, what is the new rotation rate of the disc-blob object?
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- 1. 5r2 and I have two disks. I know that disk A has a mass per unit area o given by o = disk B has o = 3r3. Each disk has radius 10cm. I have a slope at angle 45 degrees to the horizontal that is 2 m long. I time with a stop watch how long it takes the disks to roll down the slope without slipping. (Assuming that the disk's are let go with zero velocity at the top of the slope). a) Calculate the mass of each disk. [4 marks]14. A bicycle wheel is rotating at 50 rpm when the cyclist begins to pedal harder, giving the wheel a constant angular acceleration of 0.50 rad/s². (a) What is the wheel's angular velocity, in rpm, 10 s later? (b) How many revolutions does the wheel make during this time?Km A bicycle trave ling 15 * has wheels of 35 inch diameder. a) What is the angular speed of Hhe wheel s about their axis af rotation? stop unifurmly It the bigele is brought do in 25 turns of the wheels b) what is the angular accelera toon ? c) how dur does the bicyck travel during this braking time?
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- 3. A typical hard disk in a desktop computer is a uniformly solid, 400 gram disk 3.5 inches in diameter, and takes 70 milliseconds to spin from rest up to a frequency of 7200 revolutions per minute (r.p.m.). A) What is the period of the disk in seconds when it's at its final spinning rate? B) What is its angular speed in rad/s when it's at its final spinning rate? C) Assuming it is constant throughout this spin-up process, what is the angular acceleration of the disk in rad/s?? D) How many revolutions does the disk go through during this spin-up process? E) Which is bigger, the centripetal force felt by a dust particle stuck to the edge of the disk halfway through its spin-up or the centripetal force felt by an identical dust particle stuck halfway to the edge of the disk when it's at full speed?What is the angular momentum L, of a 0.300-kg tetherball when it whirls around the central pole at 70.0 rpm and at a radius of 135 cm? L₂= x10 TOOLS kg-m²/sA golfer is hitting a shot, the angular velocity of her club is zero at the top of the backswing and 30 rad/s at the bottom of the downswing just before impact with the ball. If the downswing lasts 0.30 s, what is the average angular acceleration of the club during the downswing? A. 100 rad/s^2 B. 10 rad/s^2 C. 100 deg/s^2 D. 30 rad/s^2 pick one answer only this is for biomechanics
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