One of the most common examples of uniformly accelerated motion is that an object allowed to drop will fall vertically to the Earth due to gravity. In treating falling objects as uniformly accelerated motion, we must ignore air resistance.
1. A rock is dropped from a tower 70.0 m high.
2. A person throws a ball upward into the air with an initial velocity of 15.0 m/s.
3. A car accelerates with uniform acceleration from 11.1 m/s to 22.2 m/s in 5.0 s
4. A stone is dropped from the top of a cliff. It is hits the ground after 5.5 s.
Gravity is the force that pulls all elements of matter together. Matter refers to things you can physically touch. The more matter there is, the greater the amount of gravity or force. This means that the Earth or other planets have a great deal of pull and that everything on Earth is pulled back to Earth.
Some examples of the force of gravity include: (see image below)
Gravity has the same effect on every object. If you drop a huge elephant or if you drop a small, thin feather, they will fall at the exact same speed.
The feather might look like it falls slower and it does because there is air resistance that interferes with the force of gravity and that can slow it down.
However, if you dropped a feather and an elephant in a vacuum where there was no air resistance, they'd fall at the exact same speed because there is the exact same amount of force being exerted.
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One of the most common examples of uniformly accelerated motion is that an object allowed to drop will fall vertically to the Earth due to gravity. In treating falling objects as uniformly accelerated motion, we must ignore air resistance.
1. A rock is dropped from a tower 70.0 m high.
2. A person throws a ball upward into the air with an initial velocity of 15.0 m/s.
3. A car accelerates with uniform acceleration from 11.1 m/s to 22.2 m/s in 5.0 s
4. A stone is dropped from the top of a cliff. It is hits the ground after 5.5 s.
Gravity is the force that pulls all elements of matter together. Matter refers to things you can physically touch. The more matter there is, the greater the amount of gravity or force. This means that the Earth or other planets have a great deal of pull and that everything on Earth is pulled back to Earth.
Some examples of the force of gravity include: (see image below)
Gravity has the same effect on every object. If you drop a huge elephant or if you drop a small, thin feather, they will fall at the exact same speed.
The feather might look like it falls slower and it does because there is air resistance that interferes with the force of gravity and that can slow it down.
However, if you dropped a feather and an elephant in a vacuum where there was no air resistance, they'd fall at the exact same speed because there is the exact same amount of force being exerted.