Question

Calculate the velocity of a body of mass 2kg when it is at a height of 5m. falling freely from the height of 10m.​

Answer 1

Answer:

Mass - 2 kg

Height = 15 m

Gravity - 10 m/s²

Initial Momentum :

Since the Ball is in rest, the initial velocity of the ball will be 0 m / s. Hence we know that,

Initial Momentum = Mass * Initial Velocity ( u )

=> Initial Momentum = 2 kg * 0 m / s = 0 kg . m / s

Final Velocity ( v ) = √ ( 2gh )

Final Velocity = √ ( 2 * 10 * 15 )

Final Velocity = √ 300 => 10√3 m / s

Hence Final Momentum = Mass * Final Velocity ( v )

=> Final Momentum = 2 * 10 √ 3

=> Final Momentum = 20 √ 3 kg . m / s

Hope my answer helped :-)

Explanation:

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Answer 2

ummmmmmmmmmmm. velocity is 3