Earth's temperature depends on the balance between energy entering and leaving the planet's system.
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a phenomenon whereby the moon appears bluish owing to smoke or dust particles in the atmosphere
The center of mass is given by:
∑mx/∑m
m is the mass of each object
x is the position of each object
We will assign x = 0m to the 18kg mass, therefore x = 6m for the 6kg mass.
∑mx/∑m = (18×0+6×6)/(18+6) = 1.5m
The center of mass is located 1.5m away from the 18kg mass.
The total moment of inertia of the system about the center of mass is given by:
I = ∑mr²
I is the moment of inertia
m is the mass of each object
r is the distance of each object from the center of mass
We know r = 1.5m for the 18kg mass and the rod is 6m long, therefore the 6kg mass must be r = 4.5m from the center of mass.
I = 18(1.5)² + 6(4.5)²
I = 162kg×m²
You can calculate the speed of the ball by the distance it travels divided by the time.
Length of string = 2m
Circumference of circle = 2*radius*π = 4*pi = ~12.6 meters
Speed = distance/time = 12.6m/2s = 6.28m/s
Acceleration = V²/R where the velocity at any one point is the same as the speed.
acceleration = (6.28)²/2 = ~19.72m/s²