A ball is projected with velocity 10 m s⁻¹ at an angle 60° with the vertical direction. Its speed at the highest point of its trajectory will be:
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Question

A ball is projected with velocity 10 m s⁻¹ at an angle 60° with the vertical direction. Its speed at the highest point of its trajectory will be:

G1 Physics · Accepted Answer

Step 1: An angle 60° with vertical means 30° with horizontal. Step 2: At the highest point the vertical velocity component becomes zero, while the horizontal component remains u cos30°. Step 3: Speed =10×√3/2 =5√3 m s⁻¹. Final answer: A.