Question

question 4 please help me

Answer 1

$\textbf{ \huge{ Hello Mate! }}$

$\textbf{ Given }$ = 1st and 2nd object is moving with 2 m/s and 1 m/s velocity with mass 100g and 200 g. Final velocity of 1st object = 1.67 m/s

$\textbf{ Conversion }$ => 1kg = 1000 g
100 g = 100 / 1000 kg = 0.1 kg.
Similarily, 200g = 0.2 kg

$\textbf{ Solution }$ =

Total Initial momentum = m1u1 + m2u2

= (0.1)(2) + (0.2)(1)
= 0.2 + 0.2 = 0.4 kg m/s

Total Final momentum = m1v1 + m2v2

= (0.1)(1.67) + (0.2)(v)
= 0.17 + 0.2v

T Inital Momentum = T Final momentum

0.4 = 0.17 + 0.2v

0.4 - 0.17 = 0.2v

$\frac{0.23}{0.2} = v \\ 1.15 \: m {s}^{ - 1} = v$

$\boxed{ \textsf{ \red{F Velocity\:of\:2nd\:object\:is\:1.15\:m/s }}}$

Have great future ahead!