A particle is projected from level ground with speed at an angle to the horizontal, . Find the time of flight. (Take .)
Answer and explanation
Correct answer: B.
- Step 1: Vertical component of velocity: m s.
- Step 2: s.
Answer
.
Why not the others: is what you get if you give only the time to the highest point. is what you get if you use the horizontal component. is what you get if you use the full speed.
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