You travel in a circle, whose circumference is 8 kilometers, at an average speed of 8 kilometers/hour. If you stop at the same p
2 answers:
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Answer:
The concept of conservation of momentum is applied in the particular case of collisions.
The general equation ig given by,
Where,
The crash occurs at an intersection so we must separate the two speeds by their respective vector: x, y.
In the case of the X axis, we have that the body has a speed = 0, this because it is not the direction in which it travels, therefore
The same analysis must be given for the particular case in the Y direction, where the mass body does not act with its velocity here, therefore:
We have the two components of a velocity vector given by
Get the magnitude,
With a direction given by
Answer:
2.13 s
Explanation:
Hi!
At t = 0s the rocket is at rest in its platform, so the intial speed is zero. I f the acceleration is A, then the height Y, and the speed V are:
We nedd to find time T during which the rocket engine provides upward acceleration. We know that:
With these 2 equations we can find A and T (dropping units for simplicity):
Answer:
1.38*10^18 kg
Explanation:
According to the Newton's law of universal gravitation:
where:
G= Gravitational constant (6.674×10−11 N · (m/kg)2)
ma= mass of the astronaut
mp= mass of the planet
so: