Question

A stone is thrown in vertically upward direction from the ground with a speed of 20m/s. Then its displacement in 4 sec is (g = 10 2 / ms) 1) 40m 2) zero 3) 20m 4) 80m ​

Answer 1

$\;\;\underline{\textbf{\textsf{Given:-}}}$

• Time taken, t = 4sec

•Velocity, v = 20 m/s

$\;\;\underline{\textbf{\textsf{ To Find :-}}}$

•Displacement

$\;\;\underline{\textbf{\textsf{ Solution :-}}}$

$\underline{\:\textsf{Let's try to know about displacement :}}$

• Displacement is defined as change in the position of an object.It is a vector quantity.

Formula :-

$\tt{\small{\boxed{\bold{\bold{\green{\sf{Displacement=Velocity\times{Time\:Taken}}}}}}}}$

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$\underline{\:\textsf{Now, put the given values in the formula :}}$

$\longrightarrow \tt{Displacement=20\times{4}}$

$\longrightarrow \tt{Displacement=80m}$

$\bf{ \longrightarrow Displacement = 80\: m}$

$\;\;\underline{\textbf{\textsf{ Hence-}}}$

$\underline{\textsf{ Displacement in 4 secwill be \textbf{80 m}}}.$

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