Three balls with masses of 1.0 kg, 1.0 kg, and 4.0 kg are located at coordinates (8.0m,6.0m), (7.5m,5.0m), and (2.5m,4.5m), respectively, and are connected by massless rods.1.what is the x-coordinate of the center of mass? 2.for the three balls above, what is the y-coordinate of the center of mass?

Asubmarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. what is the approximate pressure (water plus atmospheric) at this depth? (recall that the density of seawater is 1025 kg/m3, g = 9.81 m/s2, and 1 kg/(ms2) = 1 pa = 9.8692 10-6 atm.) a. 34.8 atm b. 24.8 atm c. 25.8 atm d. 7.8 atm

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.