A projectile that is fired vertically at 5 km/s from the Earth's surface will
A)go into a circular orbit about Earth.
B)go into an elliptical orbit about Earth.
C)rise and fall back to Earth's surface.
D)none of the above

Question

Quizplus · Accepted Answer

When a projectile is fired vertically from the Earth's surface, it will initially move upwards against the force of gravity until it reaches a maximum height and then fall back down to Earth. This is because the force of gravity will eventually overpower the initial upward velocity of the projectile, causing it to decelerate and fall towards the Earth. Therefore, the correct answer is C, which states that the projectile will rise and fall back to Earth's surface. Options A and B are incorrect because they suggest that the projectile will remain in orbit around the Earth, which is not possible with a vertical velocity. Option D is also incorrect because one of the other options must be correct.

A Projectile That Is Fired Vertically at 5 Km/s from the Earth's