Four point masses are connected by rods of negligible mass and form a square with sides of length 32.2 cm. Three of the masses are 1.5 kg and one is 3.0 kg. How far from the 3.0 kg mass is the center of mass of the system

Solution :

Placing the mass at the and line up the square up with the axes.

Therefore,  r =

It s given that the side of the square is a = 32.2 cm

So, r

       = 18.21 cm

So the distance of the 3 kg mass from the center of mass, r= 18.21 cm

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.