You are Here: Home >< A-levels

# Physics mechanics help Watch

1. Could you attempt the questions yourself? I just want to check my answers. If you can that would be very appreciated. Thanks.

*PIC BELOW*

(a) 60m/s
(b) 450m
(c) 3000N
(d) 30000kgm/s
(e) 450000J
2. thanks again
Attached Images

3. (Original post by KINGYusuf)
thanks again
I agree with all of them.
4. (Original post by RDKGames)
I agree with all of them.

Sorry about annoying you, just want everything to be right so I can confirm I understand everything!

I got:

(a) 22m/s
(b) 52m
Attached Images

5. (Original post by KINGYusuf)

Sorry about annoying you, just want everything to be right so I can confirm I understand everything!

I got:

(a) 22m/s
(b) 52m
I agree with the first one but not the second one. What was your calculation?
6. (Original post by RDKGames)
I agree with the first one but not the second one. What was your calculation?
Oops used the wrong velocity. I meant 36m. Is that correct?
7. (Original post by KINGYusuf)
Oops used the wrong velocity. I meant 36m. Is that correct?
8. (Original post by RDKGames)
s = ut + 1/2at^2

I'm a bit confused. Is it saying to calculate the distance from the braking part only? Or the whole distance? Because then t would be different.
9. (Original post by KINGYusuf)
s = ut + 1/2at^2

I'm a bit confused. Is it saying to calculate the distance from the braking part only? Or the whole distance? Because then t would be different.
You don't use that formula because that gives you the displacement and not the distance traveled. Displacement is how much it has moved from its starting position. If I walk a full square of side length 1m then my distance traveled is 4m while my displacement is 0m as I am back where I started.

If you draw a time-velocity graph you can easily work out the distance traveled as it is the area under the graph. Also, it is refering to the full time of motion, so for the full 12 seconds.
10. (Original post by RDKGames)
You don't use that formula because that gives you the displacement and not the distance traveled. Displacement is how much it has moved from its starting position. If I walk a full square of side length 1m then my distance traveled is 4m while my displacement is 0m as I am back where I started.

If you draw a time-velocity graph you can easily work out the distance traveled as it is the area under the graph. Also, it is refering to the full time of motion, so for the full 12 seconds.
ahhh.

My attempt:

I'm not the best at understanding and drawing graphs but does it look something like this?

The answer I got was 202m. What a weird answer, I defo got this wrong :/

Could you tell me the answer anyway?
Attached Images

11. (Original post by KINGYusuf)
ahhh.

My attempt:

I'm not the best at understanding and drawing graphs but does it look something like this?

The answer I got was 202m. What a weird answer, I defo got this wrong :/

Could you tell me the answer anyway?
I agree with that answer, your diagram is correct. Though you should label the axis if your graph is to be marked in questions like these.
12. (Original post by RDKGames)
I agree with that answer, your diagram is correct. Though you should label the axis if your graph is to be marked in questions like these.
Thank you for everything! Much appreciated

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:
Updated: October 19, 2016
Today on TSR

### Degrees to get rich!

... and the ones that won't

### Women equal with Men?

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• 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

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.