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Parametric equations

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they ask for parametric equations and they give you the speed

this is really projectile motion (the ball is moving both in the x and y dir. due to downward acceleration)

but to answer the question you only need the quantities for the x-dimension:

v(t) = 140          

x(t) = 140t


from x = 140 t   we get 60 = 140 t

which leads to t = 3/7 s