Question

A loaded lorry of mass 1500 kg moves with a
velocity of 12m/s. Within a small interval of
the time, the velocity becomes 10 m/s.
a What is the initial momentum of the lorry?​

Answer 1

Given :

• Mass of loaded lorry = 1500 kg.
• Initial velocity, $\sf V_i$ = 12 m/s.
• Final velocity, $\sf V_f$

To find :

• The Initial momentum of the lorry = ?

Formulas to be used :

• $\blue {\bf \triangle P \ = \ m \triangle v}$

Solution :

To find the initial momentum of the lorry,

We know that,

$\quad \large {\underline {\boxed {\tt \triangle P \ = \ m \triangle v}}}$

$\implies \sf \triangle P \ = \ m \triangle v$

$\implies \sf \triangle P \ = \ 1500 (2)$

$\implies \sf \triangle P \ = \ 3000 kg \ m/sec$

$\qquad \large {\underline {\boxed {\bf \triangle P \ = \ 3000 kg \ m/sec}}}$

$\therefore$ The Initial momentum of the lorry is 3000 kg m/sec.