Systems of particles and accelrations

Question 1

What is the equation for a body’s centre of mass

Answer 1

r_cm=(∫rdm)/(∫dm)
So the sum of each particle’s mass times its position vector divided by the sum of all particle mass

Question 2

For finite size objects, Newton’s second law applies unchanged if what?

Answer 2

if a is the acceleration of the centre of mass

Question 3

What are the suvat equations?

Answer 3

v=u+at
S=ut+1/2*at^2
V^2-U^2=2as