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lol. I was working on the solution so I left the post open for a while...
Sorry mate, while I was waiting for a reply I worked it out. And its just 9.8. Thanks though
consider the gravity constant g = - 9.81
lets find the initial speed components vx and vy
i) Speed and Angle @ t=4s
the x component doesn't change
the y component changes because of gravity
Speed is a vector, not a scalar.
You probably want the norm...
Now finding the angle is easy.:
θ = -23.2º means 23.2º below horizontal
ii) Finding the maximum height
we need to find the time corresponding to that moment -
plug this value in the y(t) equation and find the max height.
And that's it!
should we consider
darn I hate this question! Theres no diagram but Ill copy the question out. Oh and the topics Parbolic motion.