Author Question: At an instant when a particle of mass 80 g has a velocity of 25 m/s in the positive y direction, a ... (Read 957 times)

jace · **on:** Jul 28, 2018

At an instant when a particle of mass 80 g has a velocity of 25 m/s in the positive y direction, a 75-g particle has a velocity of 20 m/s in the positive x direction. What is the speed of the center of mass of this two-particle system at this instant?
a. 16 m/s
b. 45 m/s
c. 23 m/s
d. 20 m/s
e. 36 m/s

Question 2

At an instant when a particle of mass 50 g has an acceleration of 80 m/s2 in the positive x direction, a 75-g particle has an acceleration of 40 m/s2 in the positive y direction. What is the magnitude of the acceleration of the center of mass of this two-particle system at this instant?
a. 60 m/s2
b. 56 m/s2
c. 40 m/s2
d. 50 m/s2
e. 46 m/s2