Question

Derive The change in Momentum ​

Answer 1

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Product of mass and velocity of the body that is momentum

Momentum of a body represent the quantity of the motion present in the body

Momentum is defined as p

p = m × v

momentum= mass × velocity

mass can be measured in kg

and velocity measured in m/s

Derivation:

according to Newtown 2 law of motion

F = ma

$a \: = \frac{Vf - Vi}{t}$

$F = m \: [ \frac{Vf-Vi}{t} ] \\ F = m \: [ \frac{mVf-mVi}{t} ] \\ \\ \\ F = \frac{∆P}{t}$

SI unit = N sec²

explanation : p = mv ( formula of momentum)

kg m/sec. (m = kg and v = m/sec)

kg m/sec × sec/sec

kg m/sec² × sec

N sec (kg = N}

let us assume that we have a pet animal ostrich he is running on the ground at the speed of 8m/s and his mass is 100 then how many force apply to stop the ostrich

p= m× v

100 × 8 m/s

= 800

momentum at the end = 0

change in momentum = 800-0

=800 m/s

F = change in momentum /change in time

800 kg m/s /5s

= 160N

this is the example given from my book :)

Answer 2

Answer:

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