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sweetlavender
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4.In the javelin throw at a track-and-field event, the javelin is launched at a speed of 30 m/s at an angle of 33° above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes. How much time is required for the angle to be reduced from 33° at launch to 15°?
i don't understand how we can find the difference between the time without them giving the velocity at 15degrees?
i don't understand how we can find the difference between the time without them giving the velocity at 15degrees?