Question

If a particle of mass 5.7 kg is moving east at 10 m/s and a particle of mass 19 kg is moving west at 10 m/s, what is the velocity of the center of mass of the pair? Give answer is m/s to the west.

I tired to use: Vcm = mv/M.
I plugged in (5.7)(10) + (19)(10) / 5.7+19. = 57+190/24.7 = 10m/s. This answer is wrong. Please assist.
bobpursley
Of course it is wrong. Make E + direction, W - direction.
Thank you. I don't know why I was over looking that.
(19x10)-(5.7x10) / (19+5.7) = 5.38 m/s

Related Questions

A particle of mass m0 is given a kinetic energy equal to one-third its rest-mass energy. How fast mu... A particle of mass 2.7kg has an initial velocity of 5i+5j m/s. It is acted on by a force 2i-4.5j N... A particle of mass m = 0.35 kg is oscillating on the end of a spring with amplitude 0.32 m. It is at... A particle of mass 47 g and charge 54 C is released from rest when it is 13 cm from a second partic... A particle with the mass of a proton is trapped in a box. The particle falls from the n=3 state to t... A particle of mass =6.50 kg moves with a velocity v1=x1i+y1j+z1k. A second particle of mass =3.50 kg... A particle of mass 100 gm is thrown vertically upwards with a velocity of 7 m/s. Air resistance is a... A particle of mass 2.00×10^−10 kg is confined in a hollow cubical three-dimensional box, each edge of... Particle A has very little mass in comparison to Particle B. Both particles are in the same atom. Wh... If a particle has a mass of 1 atomic mass unit and a charge of +1, what particle must it be? * Capti...