A discus thrower increases the speed of a 2.0 kg discus from zero to 24 m/s while making 2.5 complete rotations. Assuming the angular velocity increases at a constant rate and that the discus moves in a flat circle with a radius of 2.0 meters, determine the tangential acceleration, disregarding air resistance and gravity.

• A. $6.5 \mathrm{~m} / \mathrm{s}^{2}$
• B. $7.8 \mathrm{~m} / \mathrm{s}^{2}$
• C. $9.2 \mathrm{~m} / \mathrm{s}^{2}$
• D. $12 \mathrm{~m} / \mathrm{s}^{2}$

Answer: (C)