# Questions about uniformly accelerated motion under gravity

• Vivan Vatsa
In summary: When you say "uniformly accelerated motion," what you're really saying is that the motion is constant in every direction. The maximum point where a body's velocity will change is called the "terminal velocity." It is determined by the mass and the acceleration: The terminal velocity is the maximum point where the vertical component of velocity becomes zero. Newton's First Law of Motion states that the motion of an object will remain in a straight line unless acted on by an unbalanced force. When an object is in freefall, the force of gravity (near the Earth surface) is continually decreasing the vertical component of the velocity vector at the rate of "9.8 m/s

#### Vivan Vatsa

I am not able to understand that why when a body is traveling against the gravity, there will be a point somewhere (which will be known as the maximum point where it will change its path, towards the ground) where the body's velocity become 0 m/s. Then it returns to the ground.
So my doubt is why does a body moving with uniform motion stops at one point, & changes its path towards the ground?

Look up "Newton's Laws of motion" and Newton's Law of Gravitation".
That is all you need to model motion in gravity for most situations you will encounter.
What are you having trouble with? The body is being acted on by an unbalanced force: gravity.

When an object is in freefall,
gravity (near the Earth surface) is continually decreasing the vertical component of the velocity vector at the rate of "9.8 m/s per second" (the freefall acceleration).

When the object's vertical component of velocity changes from positive to negative (passing through zero), its vertical motion turns around.
Throughout this motion, the horizontal component of velocity is unchanged--- that is to say, the horizontal motion is uniform.
(The vertical motion [ie. vertical component of velocity] is not uniform... but its "change with time" is uniform ["the vertical component of acceleration is constant"].)

Vivan Vatsa said:
I am not able to understand that why when a body is traveling against the gravity, there will be a point somewhere (which will be known as the maximum point where it will change its path, towards the ground) where the body's velocity become 0 m/s. Then it returns to the ground.
So my doubt is why does a body moving with uniform motion stops at one point, & changes its path towards the ground?
"Uniformly accelerated motion" does not mean "uniform motion." The adverb "uniformly" is modifying "accelerated," not "motion."

## 1. What is uniformly accelerated motion under gravity?

Uniformly accelerated motion under gravity refers to the motion of an object that is constantly accelerating at a steady rate due to the force of gravity. This type of motion is commonly seen in free fall or when an object is thrown upwards and falls back down.

## 2. How is uniformly accelerated motion under gravity different from other types of motion?

Uniformly accelerated motion under gravity is different from other types of motion because it is influenced by the constant acceleration of gravity, which is approximately 9.8 meters per second squared on Earth. This means that the velocity of the object increases by the same amount every second.

## 3. What is the equation for calculating uniformly accelerated motion under gravity?

The equation for calculating uniformly accelerated motion under gravity is v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. This equation can be used to determine the velocity of an object at any given time during its motion.

## 4. How does the mass of an object affect uniformly accelerated motion under gravity?

The mass of an object does not affect the acceleration of an object due to gravity. This is because the force of gravity is independent of an object's mass. However, the mass of an object does affect the force of gravity, as a more massive object will experience a greater force of gravity than a less massive object.

## 5. What factors can affect the acceleration of an object under gravity?

The acceleration of an object under gravity can be affected by the mass of the object, the force of gravity, and any external forces acting on the object. Air resistance can also affect the acceleration of an object, as it can slow down the object's fall and decrease its acceleration due to gravity.