Question #5b0b1

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Question #5b0b1

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Answer 1 · 2017-04-14T17:04:49

$105 m$ $105m$

Explanation:

Using the applicable kinematic expression

$h = u t + \frac{1}{2} g t^{2}$ $h=ut+1/2g t^2$
where $h$ $h$ is the height after time $t$ $t$ . $u$ $u$ is initial velocity and $g$ $g$ is acceleration due to gravity.

Inserting giving numbers and remembering that gravity is acting against the direction of motion

$h = 50 \times 7 + \frac{1}{2} (- 10) {(7)}^{2}$ $h=50xx7+1/2(-10) (7)^2$
$\Rightarrow h = 350 - 245$ $=>h=350-245$
$\Rightarrow h = 105 m$ $=>h=105m$

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