Question

(a) find the tension in the rope. (b) find the angular acceleration of the wheel.

Answer 1

The TM-1 can be used to accurately and reliably measure the tension of each spoke in a wheel. The TM-1 will also measure the average tension of all the spokes in a wheel, and the relative tension between all the spokes in the wheel. It works on nearly any bicycle spoke, no matter what the diameter, material, or shape. The TM-1 Tension Meter is a precision measuring instrument and should be used and stored with care. To avoid damage, it is recommended that the TM-1 be stored in its original packaging or suspended from a bench hook. It should always be kept clean and dry. As new spokes are developed, check the TM-1 Tension Meter page for updated reading conversion tables.
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Answer 2

tension in tope T=force on the tope/it's length
angikar acceleration = linear acceleration× radius of the wheel