. To determine the motion of the centre
of mass of a system no knowledge
of internal forces of the system is
required.
a) Define centre of mass of a system
of particles.
b) Find the centre of mass of three
particles at the vertices of an
equilateral triangle. The masses of
the particles are 100 g, 150 g and
200 g respectively. Each side of
- the equilateral triangle is 0.5m long
c)discuss the motion of the centre of mass during the explosion of a shell thrown into air.
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Answer:i know only ans sub a and c
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