Question

a toy pops up to a height of 2.52 m .find it initial velocity​

Answer 1

Explanation:

hope it works

Ans - 7 m/s

the ans is 7 meter per sec

Answer 2

$\maltese\:\large\underline\orange{\pmb{\sf Given:- }}$

• height = 2.52 m
• final velocity = 0m/s
• accelaration due to gravity = - 9.8 m/s²

$\bigstar$ The final velocity is assumed to be zero because the object comes to rest momentarily after reaching the maximum height. $\bigstar$

$\maltese\:\large\underline\orange{\pmb{\sf Solution:- }}$

• By using 3rd Kinematical equation:-

$\leadsto\large\underline{\boxed{\pink{{\sf v^{2}-u^{2} =2as }}}}\bigstar$

• v, u, a, and s represent final velocity, initial velocity, acceleration, and displacement respectively.

$\dag\underline{\frak{Substituting\:the\:values\:in\:equation:-}}$

$:\implies\sf (0)^{2} -(u)^{2} =2(-9.8)(2.52)$

$:\implies\sf -(u)^{2} = -49 \:(approx)$

$:\implies\boxed{\pink{{\sf u = 7 m/s}}}\bigstar$

$\therefore\underline{\sf our\:required\:answer\:is\:7m/s}$