Question

A stone is dropped from the height of 20m.What will be the speed when it hit the ground

Answer 1

$\huge\underline\green{\sf Answer:-}$

★$\large{\boxed{\sf Speed\:(v)=20m/s}}$

$\huge\underline\green{\sf Solution:-}$

$\large\underline{\sf Linear\:Motion}$

$\large{\boxed{\sf y=y_{o}+vt+{\frac{1}{2}}g{t}^{2}}}$

$\large\underline{\sf Given:-}$

y = 20m

★Assume $\large{\sf y_{0} and v\:be\:zero}$

ON PUTTING VALUE :-

$\large{\sf 20 ={\frac{1}{2}} \times 10 \times {t}^{2}}$

$\large{\sf {t}^{2} = {\frac{2 \times 20}{10}}}$

★$\large{\boxed{\sf t=2s}}$

$\large{\sf So, Velocity\:at\:t=2s}$

$\large{\boxed{\sf v=v_{o}+gt}}$

$\large{\sf v=0+10 \times 2}$

★$\huge\red{\boxed{\sf v=20m/s}}$

Answer 2

❤Hey❤

Refer to the attachment!!