Question

An object is thrown vertically upwards and rice to height of 10m. calculate the velocity with which of object and the time take by the object to reach highest point?

Answer 1

distance travelled =10m

Answer 2

$\large\underline\mathrm\red{Solution}$

Height raised, h = 10m

Final velocity, v = 0 m/s

Acceleration due to gravity, g = 9.8 m/s²

Acceleration due to object, a = -9.8 m/s²

$\large\underline\mathrm\red{Now}$, we know that v² = u² + 2ah

$\implies$0 = u² + 2 × (-9.8) × 10

$\implies$-u = -2 × 9.8 × 10

$\implies$u = √196 m/s

$\implies$14 m/s

$\large\underline\mathrm\red{Also}$, v = u + at

$\implies$0 = 14 m/s - 9.8 m/s² × t

$\implies$t = 1.43s

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