A rock is thrown downward from an unknown
height above the ground with an initial speed
of 26 m/s. It strikes the ground 4.1 s later.
Determine the initial height of the rock
above the ground. Theacceleration of gravity
is 9.8 m/s
2
.

Question

A rock is thrown downward from an unknown
height above the ground with an initial speed
of 26 m/s. It strikes the ground 4.1 s later.
Determine the initial height of the rock
above the ground. Theacceleration of gravity
is 9.8 m/s
2
.

anonymous · Answer

$$h_0+26t-19.6t^2=0$$ put  $t=4.1$ and solve for $h_0$

anonymous · Answer

okay, thats what i thought. thank you.