For two bodies of masses and moving along the same straight line with speeds and…

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

For two bodies of masses

m_1

and

m_2

moving along the same straight line with speeds

u_1

and

u_2

respectively, they collide and stick together. Which expression gives their common speed

v

just after the collision? (a)

\dfrac{u_1+u_2}{2}

(b)

\dfrac{m_1 u_1 + m_2 u_2}{m_1 + m_2}

(c)

\dfrac{m_1 u_1 - m_2 u_2}{m_1 + m_2}

(d)

\dfrac{m_1 u_1 + m_2 u_2}{m_1 - m_2}