# Solving a Vertical Ball Throwing Problem: Velocity and Time Calculation

• inbetween
In summary, the conversation is about a homework question involving a ball being thrown vertically and a man attempting to catch it from a tower. The question asks for the velocity of the ball when caught and the time it takes to be caught. The conversation includes a discussion of the relevant equations and a suggested approach for solving the problem.
inbetween
Simple Question (Stuck!)

Stuck on my christmas revision questions. Basically here it is below.

## Homework Statement

A ball is thrown vertically with a speed of 17ms-1. A man standing upon a tower 5m above the thrower attempts to catch the ball but fails. He does however catch the ball successfully on its way down.

What is A) The balls velocity when he catches it, B) The time it takes between throwing the ball and it being caught.

## Homework Equations

v^2 = u^2 + 2as

s=distance(displacement)
v=final velocity
u=initial velocity
a=acceleration
t=time

## The Attempt at a Solution

I attempted to work out the maximum height reached by the ball as it passes the tower so i need to know how high it goes to work out the final velocity when it returns to be caught. I worked out the height reached as 14.73m and then took away the difference between the height of the tower (5m) and the maximum height giving the distance the ball falls from the reached height to the point where it is caught 5m above the thrower. Using this i have an initial velocity of zero and an acceleration as a result of gravity (9.8ms). I'm a bit stuck though where to go from here and not fully confident i am doing the solution correct in the first place.

What you've done so far will enable you to find the speed after falling from it's maximum height, using the equation you have provided.

As far as figuring out the time involved, look for another kinematic formula. How would you express the height as a function of time for this projectile?

i am telling you how to solve the 2nd part, while going up, use v=u+at where u would be 17ms-1 and v=0 and a=-9.8ms-2. You will get the time as 1.73s. Then while the ball comes down, put u=0 and v=13.51ms-2(the velocity you got in the 1st part of the question) and a=9.8ms-2 in the above formula to get the time it takes for the ball to come down. Add the two times and you get your answer

## 1. What is a simple question?

A simple question is a question that can be answered with a brief and direct response. It typically does not require a lot of thought or explanation.

## 2. Why do people get stuck on simple questions?

People may get stuck on simple questions because they overthink the answer or they may be looking for a more complex solution. Sometimes, simple questions can also be misleading or unclear, causing confusion and difficulty in finding the right answer.

## 3. How can I avoid getting stuck on simple questions?

To avoid getting stuck on simple questions, it's important to approach them with a clear and focused mindset. Try breaking down the question into smaller parts and analyzing each part individually. You can also ask for clarification if the question is unclear or take a short break and come back to it with a fresh perspective.

## 4. Is there a benefit to asking simple questions?

Yes, there can be many benefits to asking simple questions. They can help clarify information, provide a quick and easy solution, and can even lead to deeper understanding and insights. Simple questions also encourage critical thinking and can help build a strong foundation for more complex problem-solving.

## 5. What are some examples of simple questions?

Some examples of simple questions include "What time is it?", "How do you spell this word?", and "What is the capital of France?". These questions have clear and direct answers and do not require much thought or explanation.

### Similar threads

• Introductory Physics Homework Help
Replies
5
Views
257
• Introductory Physics Homework Help
Replies
5
Views
238
• Introductory Physics Homework Help
Replies
38
Views
1K
• Introductory Physics Homework Help
Replies
9
Views
2K
• Introductory Physics Homework Help
Replies
14
Views
1K
• Introductory Physics Homework Help
Replies
11
Views
2K
• Introductory Physics Homework Help
Replies
10
Views
5K
• Introductory Physics Homework Help
Replies
7
Views
1K
• Introductory Physics Homework Help
Replies
10
Views
1K
• Introductory Physics Homework Help
Replies
4
Views
317