Answer the above THE BEST WILL GET BRAINLIEST
Note: if you randomly wrote anything you will be reported
PS: You will not get the answer in google so don't waste your time!!
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Answer: take the horizontal component of velocity in each case and equal them both
in case 1 its speed is u making θ with the horizontal so
horizontal component = u.cosθ
in case 2 it makes α with horizontal lets consider its speed to be v
horizontal component = v.cosα
since the velocity of horizontal component is constant
u.cosθ= v.cosα
i.e v= u.cosθ/cosα
so your option is 4.
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