What force opposes gravity for a falling object?

What force opposes gravity for a falling object?

What counteracts gravity is buoyancy. Imagine a chunk of rock deep inside the Earth. The pressure at the top of the rock is slightly less than is the pressure at the bottom of the rock because of hydrostatic equilibrium. This pressure gradient results in a buoyant force that keeps the chunk of rock where it is.

When a rock is thrown straight upwards gets to?

When a rock thrown straight upward gets to the exact top of its path, the magnitude of its a velocity is zero and its acceleration is zero.

What will likely happen if a rock is thrown straight up into the air neglecting air resistance?

If an object is thrown straight up and air resistance is negligible, then its speed when it returns to the starting point is the same as when it was released.

What happens to an object in free fall when it is thrown?

When the object has left contact with whatever held or threw it, the object is in free fall. When the object is thrown, it has the same initial speed in free fall as it did before it was released. When the object comes in contact with the ground or any other object, it is no longer in free fall and its acceleration of g is no longer valid.

Why does the Earth’s gravity make things fall so slow?

This is a general characteristic of gravity not unique to Earth, as astronaut David R. Scott demonstrated in 1971 on the Moon, where the acceleration from gravity is only 1.67 m/s2 and there is no atmosphere. In the real world, air resistance can cause a lighter object to fall slower than a heavier object of the same size.

What happens to the acceleration when an object hits the ground?

When the object comes in contact with the ground or any other object, it is no longer in free fall and its acceleration of g is no longer valid. Under these circumstances, the motion is one-dimensional and has constant acceleration of magnitude g.