This is a problem from my practice test. I am not sure how tosolve this. I reall

Question

This is a problem from my practice test. I am not sure how tosolve this. I really just need to know what to do to find time(t) A projectile is fired over level ground with an initialvelocity that has a vertical component of 20 m/s(Y) and ahorizontal component of 30 m/s(X).She states to use 10 m/s squaredas gravity. She wants to know the distance from launching tolanding point. I am not given an angle so I assume she has removed the needfor it since I have initial velocity numbers for x and y. So since I don't have x or t I can't use the x = Vi(x) *t to get x or t. I am not sure how to find t from here. Once I gett I will be fine. Thanks for any help you can give. This is a problem from my practice test. I am not sure how tosolve this. I really just need to know what to do to find time(t) A projectile is fired over level ground with an initialvelocity that has a vertical component of 20 m/s(Y) and ahorizontal component of 30 m/s(X).She states to use 10 m/s squaredas gravity. She wants to know the distance from launching tolanding point. I am not given an angle so I assume she has removed the needfor it since I have initial velocity numbers for x and y. So since I don't have x or t I can't use the x = Vi(x) *t to get x or t. I am not sure how to find t from here. Once I gett I will be fine. Thanks for any help you can give.

Explanation / Answer

time of flight T = 2 ( vertical -component ) / g                       = 2 * 20 / 10 = 4 s Required distance = T * horizontal component                             = 4 * 30 = 120 m

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