Question

Please answer c and d

Step 1

A rock is thrown upward with a velocity of 10 m/s. Its height ( in meters) after t seconds is given by H= 10t-1.86t^{2.}.

c. When will be the rock hit the surface?

d. With what velocity with the rock hit the surface?

Step 2

Given H= 10t -1.86t^{2}.

Rock will hit the ground when H=0

Step 3

Plugging H=0 in above equation and solving for t

0 = 10t-1.86t2

0 = t(10-1.86t)

Using &...

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