All Questions
5
questions
1
vote
2
answers
244
views
Flat Earth interpretation of Newtonian gravity [closed]
Consider a projectile body launched from the earth's surface with a speed lower than the escape velocity.
The orbit of the body under Newtonian gravity traces an ellipse which intersects with the ...
- 2,402
16
votes
6
answers
3k
views
Is projectile motion an approximation? [duplicate]
Doesn't the acceleration vector points towards the center of the Earth and not just downwards along an axis vector. I know that the acceleration vector's essentially acting downwards for small ...
- 191
18
votes
5
answers
9k
views
Elliptical Trajectory, or Parabolic?
Discuss whether this statement is correct: “In the absence
of air resistance, the trajectory of a projectile thrown near the
earth’s surface is an ellipse, not a parabola.”
Is the above statement ...
- 1,921
0
votes
2
answers
938
views
How is the uniform gravitational field approximation $F_g\approx mg$ near Earth's surface derived from Newton's law $F_g=GMm/r^2$ of gravitation?
I am really bothered about how we can derive the equation of projectile motion.
Suppose a point mass will move in the gravitational field of the Earth according to the equation $$\ddot R =-\frac{...
- 173
1
vote
1
answer
189
views
Why does a difference in approach to projectile motion yields different results?
A body is projected vertically upwards from the surface of the earth with a velocity equal to half the escape velocity. If $R$ is the radius of the earth, then find the maximum height attained by the ...
- 345