Kinematics
A Motorcyclist travels on a straight road with a constant acceleration of 0.6 ms^-2
P and Q are two points on the road 120m apart. Given that the motorcyclist increases speed by 6 ms^-1 between these two points as she travels from P to Q find:
a) The time taken to travel from P to Q
Somebody help with this question.
P and Q are two points on the road 120m apart. Given that the motorcyclist increases speed by 6 ms^-1 between these two points as she travels from P to Q find:
a) The time taken to travel from P to Q
Somebody help with this question.
Reply 1
21
Which suvat may be appropriate here (write down clearly what youre given).
Reply 2
2
I think S=ut + 1/2at^2
S=120 , U=6 , A=0.6 , t= ? Is that correct?
S=120 , U=6 , A=0.6 , t= ? Is that correct?
Reply 3
21
Original post
by JosephbrianI think S=ut + 1/2at^2
S=120 , U=6 , A=0.6 , t= ? Is that correct?
S=120 , U=6 , A=0.6 , t= ? Is that correct?
You dont know u, as youre told the velocity increases by 6m/s over that time, so it cant be that one. Think about which suvats involve acceleration and time and whether you know the other "two" things.
Reply 4
2
Original post
by mqb2766You dont know u, as youre told the velocity increases by 6m/s over that time, so it cant be that one. Think about which suvats involve acceleration and time and whether you know the other "two" things.
S=vt - 1/2at^2. Or v=u + at that’s if u is 0. So which is it and what are the values for suvat?
Reply 5
21
Original post
by JosephbrianS=vt - 1/2at^2. Or v=u + at that’s if u is 0. So which is it and what are the values for suvat?
Id rearrrange v=u+at and note that 6 is the change in velocity so ...
Reply 6
2
Original post
by mqb2766Id rearrrange v=u+at and note that 6 is the change in velocity so ...
Is it like this 6=0+0.6*t to get 10s ? What is ur answer for question?
Reply 7
21
Original post
by JosephbrianIs it like this 6=0+0.6*t to get 10s ? What is ur answer for question?
Yes, though its incorrect to assume u=0. You should really just write it down as the definition of (constant) acceleration is
acceleration = change in velocity / change in time
so
0.6 = 6/t
The v=u+at is the basic gcse suvat which wraps that up.
(edited 2 years ago)
Reply 8
2
Original post
by mqb2766Yes, though its incorrect to assume u=0. You should really just write it down as the definition of (constant) acceleration is
acceleration = change in velocity / change in time
so
0.6 = 6/t
The v=u+at is the basic gcse suvat which wraps that up.
acceleration = change in velocity / change in time
so
0.6 = 6/t
The v=u+at is the basic gcse suvat which wraps that up.
Wow thanks, idk why it’s a 5 mark question just for that.
Quick Reply
Related discussions
- GCSE Edexcel Kinematics?
- physics question help please
- Flashcard
- What's your biggest gripe(s) in the subjects you're studying?
- y2 edexcel mechanics projectiles VS forces and applying
- Integral Maths Topic Assessment Solutions
- Mechanical Engineering course structure
- GYG for someone who's just a girl 🎀🎀🎀 (and need to lock in)
- Should I js drop accounting and pick further maths instead? (igcse/OL/gcse)
- A level maths in engineering
- if i get a tutor now, will it be useful for maths levels
- Any subject specific advice for incoming aerospace engineering student?
- physics or spanish a level
- Summary of my lessons in a school day (y12)
- Daily Drop In: Rate how productive your half term week has been
- TSR Study Together - STEM vs Humanities General Study Session 2!
- Entry requirements for Geology courses
- OCR A-level Physical Education Paper 1 - 23rd May 2025 [Exam Chat]
- Stats and mechanics (the bane of my existence)
- Aerospace or Mechanical Engineering Decision for 2025 HELP PLEASEEE
Latest
Trending
Last reply 7 months ago
Methods of rationalisation of denominators of complex numberLast reply 7 months ago
Which A-level Maths/Further Maths topics gave you the most trouble?Posted 8 months ago
Pls help me pls im acc gonna die pls pls help me AS EDEXCEL MATHSLast reply 8 months ago
Grade Boundaries Edexcel Further Maths 3A 3C (FP1 & FM1)Last reply 8 months ago
Edexcel AS Level Maths May 15th 2025 Pure Paper 1 + Unofficial Mark SchemeMaths Study Help
67
160
How The Student Room is moderated
To keep The Student Room safe for everyone, we moderate posts that are added to the site.
