A projectile that is fired vertically from the surface of Earth at 5 km/s will
A)go into circular 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 with a velocity of 5 km/s, it will rise to a certain height against the force of gravity and then will start falling back towards Earth's surface. This is because the initial velocity of the projectile is not sufficient to achieve the required velocity of 7.9 km/s to enter into Earth's orbit. Therefore, the projectile will not go into a circular or elliptical orbit but will instead follow a parabolic path and eventually fall back to the surface of the Earth. Hence, option C is the best choice.

A Projectile That Is Fired Vertically from the Surface of Earth