IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: EMO123 on February 08, 2011, 03:16:52 pm

Title: Acceleration
Post by: EMO123 on February 08, 2011, 03:16:52 pm

A car is traveling with uniform acceleration along a road. The road has marker posts every 100 m. When the car passes one post, it has a speed of 10 ms^-1 and, when it passes the next one, its speed is 20 ms^-1. What is the car's acceleration?

Title: Re: Acceleration
Post by: Khey [Rainbow] on February 08, 2011, 04:10:46 pm

This is M1?
Anyways..here i am solving ur problem again...

s= Distance       100m
u= Initial speed  10m/s
v= Final speed    20m/s
a= acceleration   ?

v^2= u^2 + 2as
making a as the subject
u'll get : (v^2 - u^2)/2s

a= 1.5m/s^2

Title: Re: Acceleration
Post by: EMO123 on February 08, 2011, 04:51:20 pm

thanxx and it is physics only i did not focus on the formula so i did not get the ans

Title: Re: Acceleration
Post by: Khey [Rainbow] on February 09, 2011, 11:57:14 am

oh
kk