Answer:
The rate of change of distance between the two ships is 18.63 km/h
Explanation:
Given;
distance between the two ships, d = 140 km
speed of ship A = 30 km/h
speed of ship B = 25 km/h
between noon (12 pm) to 4 pm = 4 hours
The displacement of ship A at 4pm = 140 km - (30 km/h x 4h) =
140 km - 120 km = 20 km
(the subtraction is because A is moving away from the initial position and the distance between the two ships is decreasing)
The displacement of ship B at 4pm = 25 km/h x 4h = 100 km
Using Pythagoras theorem, the resultant displacement of the two ships at 4pm is calculated as;
r² = a² + b²
r² = 20² + 100²
r = √10,400
r = 101.98 km
The rate of change of this distance is calculated as;
r² = a² + b²
r = 101.98 km, a = 20 km, b = 100 km
79 m/s I belive.
I hope I'm not incorrect!
Answer:
Explanation:
Please try to take a better photo as it is difficult to read.
For the first case, it is a small force to the right as there is a small velocity change.
For the second case, there is no force as there is no change in velocity
For the third case, it is a large (could be medium but photo is too blurry) force to the right as there is a large change in velocity.
<h2>Answer:</h2>
First, it is necessary to say that the chances of the Sun becoming a black hole are practically nil, because its nucleus is not big enough to become a black hole.
However, in the imaginary case that happens, since the Sun is a star that revolves around itself, its core would continue rotating, so much so that probably the planets would continue with their orbits with absolute normality (including Earth).
This black hole would have the same mass and, consequently, the same gravity, as the original sun. Therefore the orbiting planets would not notice any difference from the gravitational point of view.
Now, life as known currently, would experience a huge change due to the absence of light (black holes do not emit light). The Earth would be under complete darkness and would have an extreme cold that would end living beings on its surface.
