Freefall: Solving Questions with Initial Velocity of 20 m/s

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In summary, freefall is the motion of an object falling under the influence of gravity with an initial velocity of 20 m/s. This velocity can be determined using the equation v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration due to gravity, and t is the time. The acceleration due to gravity is a constant value of 9.8 m/s^2 and can be used to solve problems involving freefall. Other factors such as air resistance, external forces, and location can affect the initial velocity of 20 m/s in freefall.
  • #1
kitle545
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I don't know how to do this problem. I feel like I need more information.

A ball is thrown upward with an initial velocity of 20 m/s.

1. How long is the ball in the air?

2. How long after release is the ball 15 m above the release point?
 
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  • #2
For #1:

What is the initial velocity?
What is the velocity when the ball reaches the top of its upward travel?
Waht is the acceleration due due gravity?
Is the time taken to reach the top of its upward travel equal to the time to return to earth?
 
  • #3


As a scientist, it is important to approach problems with a systematic and analytical mindset. In order to solve these questions, we need to start by identifying what information we have and what information we need. In this case, we have the initial velocity of the ball, which is 20 m/s, but we are missing other crucial details such as the height of the release point and any information about air resistance. Without these key pieces of information, it is impossible to accurately solve these questions. I would recommend seeking out additional information or clarification in order to properly solve these problems. Additionally, it may be helpful to review the equations and principles of freefall and motion in order to better understand how to approach these types of problems.
 

1. What is freefall?

Freefall is the motion of an object falling under the influence of gravity without any other forces acting on it. In this scenario, the object's initial velocity is 20 m/s.

2. How is the initial velocity of 20 m/s determined?

The initial velocity of 20 m/s is usually given in the problem or can be calculated using the equation v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration due to gravity (9.8 m/s^2) and t is the time.

3. What is the acceleration due to gravity?

The acceleration due to gravity is a constant value of 9.8 m/s^2 and represents the rate at which objects accelerate towards the ground when falling.

4. How can the initial velocity of 20 m/s be used to solve problems?

The initial velocity of 20 m/s can be used to solve problems involving freefall by plugging it into the equations of motion and solving for other variables such as time, final velocity, or displacement.

5. Are there any factors that can affect the initial velocity of 20 m/s in freefall?

Yes, factors such as air resistance, external forces, and the location or altitude of the freefall can all affect the initial velocity of 20 m/s.

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