Answer:
0.64 m
Explanation:
The first thing is calculate the center of mass of the system.
now multiplying every coordinate x by the mass of each object (romeo, juliet and the boat) and dividing all by the total mass taking by reference the position of juliet.
X_cm = 1.4589 m
When the forces involved are internals, the center of mass don't change
After the movement the center of mass remains in the same distance from the shore, but change relative to the rear of the boat.
X_cm= 2.10 m
this displacement is how the boat move toward the shore.
2.10-1.46= 0.64 m
Answer:
the Earth's crust is broken into about 12 plates that float on hotter, softer rocks in the underlying mantle
Explanation:
Answer: The average speed over the entire trip is 3.94 m/s
Explanation:
As we know : 
Let the distance of straight line from point to point be = d
Total distance covered = 2d
Time taken to cover the forward journey = 
Time taken to cover the backward journey = 
Total time for the journey = Time taken to cover the forward journey + Time taken to cover the backward journey = 
Average speed = 
Thus average speed over the entire trip is 3.94 m/s
I believe it is b
Hope I helped!
