# Question #c022b

##### 1 Answer

#### Explanation:

There’s a little bit of ambiguity in this question: does it mean to rise up 5 m and fall back down or just to rise 5 m? I’ll write a solution for both as both solutions are just applications of constant acceleration equations and the former is simply the latter solution multiplied by two.

Time to rise up to 5 m.

Write down what you know:

Use this equation:

Note that

Make

Substitute in the values:

Obviously the time cannot be negative so the solution for this problem is

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If the question requires the time to rise 5 m and fall back down then double the time ⇒