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A body is projected at t = 0 with a velocity 10 ms –1 at an angle of 60° with the horizontal. The radius of curvature of its trajectory at t = 1s is R. neglecting air resistance and taking acceleration due to gravity g = 10 ms –2 , the value of R is :

1. 2.8 m
2. 5.1 m
3. 2.5 m
4. 10.3m

Correct answer: 2.8 m

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