I need help

Question

A ring of radius R and mass M1 lies on a fractionles table. It is pivoted to the table at its rim. A bug of mas M2 walks on the ring with constant speed v relative to the ring,starting at the pivot,when the ring is initally at rest . Take k to point out of the page

Answer 1

I need help
A ring of radius R and mass M1 lies on a frictionless table. It is pivoted to the table at its rim. A bug of mas M2 walks on the ring with constant speed v relative to the ring,starting at the pivot,when the ring is initially at rest . Take k to point out of the page

Answer 2

A jewelry store in Lanberry bought a gold ring for $550 and marked it up 50% from the original cost. Later on, Beth purchased the gold ring and paid Lanberry sales tax of 8%. How much, including tax, did she pay for the gold ring?