easy physics problem....need help!!! Watch

dsolmon
Badges: 0
#1
Report Thread starter 9 years ago
#1
A sports car is advertised to be able to stop in a distance of 50m from a speed of 90k/h. What is its aceleration in m/s^2? How many g's is this?
0
reply
wizz_kid
Badges: 2
Rep:
?
#2
Report 9 years ago
#2
(Original post by dsolmon)
A sports car is advertised to be able to stop in a distance of 50m from a speed of 90k/h. What is its aceleration in m/s^2? How many g's is this?

Acc = (v-u)/t

v = 0
u = 90 km/h (convert in m's)
t = can be worked out

then just sub in the equation!
0
reply
sk88
Badges: 2
Rep:
?
#3
Report 9 years ago
#3
You would have to use suvat in order to work this out,
S=50m
U= (90,000/3600)
V=0
A=?
T=?

So using the formula V^2 = U^2 +2AS ...you can work out A (acceleration) , if you divide this by 9.81..it will tell you how many g's it is.
0
reply
dsolmon
Badges: 0
#4
Report Thread starter 9 years ago
#4
Thank you so much! I want to be able to do this on my own but i have a hard time trying to figure out where to put the different numbers in the formulas.
So the answer is 6.25m/s^2, 0.64g's, right?
0
reply
sk88
Badges: 2
Rep:
?
#5
Report 9 years ago
#5
(Original post by dsolmon)
Thank you so much! I want to be able to do this on my own but i have a hard time trying to figure out where to put the different numbers in the formulas.
So the answer is 6.25m/s^2, 0.64g's, right?
Yep that is correct
0
reply
dsolmon
Badges: 0
#6
Report Thread starter 9 years ago
#6
(Original post by sk88)
Yep that is correct
Sweet! hey, maybe you could help me with my other thread i posted. Its is titled: Having a hard time getting it right!!
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

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.

Personalise

University open days

  • Cranfield University
    Cranfield Forensic MSc Programme Open Day Postgraduate
    Thu, 25 Apr '19
  • University of the Arts London
    Open day: MA Footwear and MA Fashion Artefact Postgraduate
    Thu, 25 Apr '19
  • Cardiff Metropolitan University
    Undergraduate Open Day - Llandaff Campus Undergraduate
    Sat, 27 Apr '19

Have you registered to vote?

Yes! (314)
37.83%
No - but I will (64)
7.71%
No - I don't want to (62)
7.47%
No - I can't vote (<18, not in UK, etc) (390)
46.99%

Watched Threads

View All
Latest
My Feed