$A$ particle of mass $200 \,g$ is moving in a circle of radius $2 \,m$. The particle is just 'looping the loop'. What are the speed of the particle and the tension in the string at the highest point of the circular path? (Take $g = 10 \,m/s^2$)
- A$4 \,m/s, 5 \,N$
- B$4.47 \,m/s, 0 \,N$
- C$2.47 \,m/s, 0 \,N$
- D$1 \,m/s, 0 \,N$
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