You are Here: Home >< A-levels

# physics question help

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. A projectile is fired from a seige engine at 35ms at an angle of 60 degrees to the horizonal.
a)what is its vertical velocity at the top of its flight?
2. Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.

Just quoting in Danny Dorito so she can move the thread if needed
Spoiler:
Show
(Original post by Danny Dorito)
x
4. (Original post by isthisgood)
A projectile is fired from a seige engine at 35ms at an angle of 60 degrees to the horizonal.
a)what is its vertical velocity at the top of its flight?
Do you know how to resolve a vector into components?
5. (Original post by isthisgood)
A projectile is fired from a seige engine at 35ms at an angle of 60 degrees to the horizonal.
a)what is its vertical velocity at the top of its flight?
You'll need to resolve the components first; we can do this through pythagoras! Our best friend in the whole world.

Imagine you've got a triangle with one side against a wall, one side over the roof, then an angle from the roof down to our velocity which is a line from the corner to the middle of the room. Sort of like this. The *** shows the angle, the top is our horizontal component, and the side our vertical
________________
|-+---------*
|---+------*
|-----+--*
|--------+
|----------+

Our +++ line is our full velocity, or actual, whichever you want to call it, 35 ms. We can resolve it by 35cos(phi), where phi in this situation is *** which is 60 degrees (for horizontal), or 35sin(phi) for our vertical component.

So, 35 sin 60 is our vertical component, which should be 30.31 ms.
6. Vertical velocity at top of flight=0

Posted from TSR Mobile
7. At the top of its flight the projectile is instantaneously at rest (vertically), if you draw its path, the top of its path represents the point where it is momentarily changing direction from going upwards to falling downwards.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: October 18, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll

## All the essentials

### Student life: what to expect

What it's really like going to uni

### Essay expert

Learn to write like a pro with our ultimate essay guide.

### Create a study plan

Get your head around what you need to do and when with the study planner tool.

### Resources by subject

Everything from mind maps to class notes.

### Study tips from A* students

Students who got top grades in their A-levels share their secrets