In a physics experiment, an object with a mass of m = 4.60 kg is attached to the free end of a light string wrapped around a reel of radius R = 0.245 m and mass M = 3.00 kg. The reel is a solid disc, free to rotate in a vertical plane about the horizontal axis passing through its centre as shown in the figure below. The suspended object is released from rest 2.05 m above the floor.

Determine the tension in the string.

I tried mg-ma but the answer is wrong...

Question

In a physics experiment, an object with a mass of m = 4.60 kg is attached to the free end of a light string wrapped around a reel of radius R = 0.245 m and mass M = 3.00 kg. The reel is a solid disc, free to rotate in a vertical plane about the horizontal axis passing through its centre as shown in the figure below. The suspended object is released from rest 2.05 m above the floor.

Determine the tension in the string.

I tried mg-ma but the answer is wrong...

anonymous · Answer

Might help if you upload a picture of the problem :)