Question

The change in momentum of a body is represented by delta p=m delta v.when is this expression valid for the change in the linear momentum? Please solve fast plzz=================================

Answer 1

Answer:

The expression is valid only when the mass of the system is constant and momentum is changing due to change in the velocity

Explanation:

Change in the momentum of a system of mass is given as

$\Delta P = m\Delta v$

here we know that

momentum of a given mass is

$P = mv$

so here we assumed that mass of the system is conserved and speed is changing so here we will have

$P_i = m v_i$

$P_f = m v_f$

so change in the momentum is given as

$\Delta P = P_f - P_i$

$\Delta P = m(v_f - v_i)$

$\Delta P = m\Delta v$

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Topic : Change in momentum

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Answer 2

Answer:

Momentum=mass * velocity .

Initial momentum=mu.

Final momentum=mv

Change in momentum

mv-mu

Let time taken be t

(mv - mu)/t [Rate of change momentum]

{Hint : if time =t then x=?}

Explanation:

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