Question

A body is thrown vertically upward with velocity 20m/s .How long time it remains in air? (g=10m/s2)

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Answer 1

I don’t know, it depends if they have a parachute and can deploy it quickly enough. If they do, the drag and air resistance would gently bring them down at a much slower pace than freefalling. Not enough information to solve this.

Answer 2

`\boxed{\sf Time \ being \ in \ which \ body \ remains \ in \ air = 4 \ s}`

Given:

Velocity (u) = 20 m/s

Acceleration due to gravity (g) = 10
`\sf m/s^2`

To Find:

Time (t) being in which body remains in air.

Step-by-step explanation:

Formula:

`\boxed{\bold{\sf t=(2u)/(g)}}`

Substituting values of u & g in the equation:

`\sf \implies t = (2 * 20)/(10)`

`\sf \implies t =(40)/(10)`

`\sf \implies t =\frac{4 * \cancel{10}}{ \cancel{10}}`

`\sf \implies t = 4 \ s`

`\therefore`

Time (t) being in which body remains in air = 4 seconds