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Question

A body is thrown with a velocity of 10m/s at an angle of 45o to the horizontal. The radius of curvature of its trajectory in t=1/2sec after the body began to move is:

A
0m
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B
2.5m
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C
5m
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D
None
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Solution

The correct option is B 2.5m
We know maximum height that a projectile can attain H=v20sin2θ2g=radius of curvature of trajectory.
Given v0=10 m/s and θ=450and g=10m s2
Thus H=100×14×10=2.5 m

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