Qualification > Queries

Maths & Physics Help

<< < (8/9) > >>

astarmathsandphysics:
Will answer when i get home

Ghost Of Highbury:

--- Quote from: toobeerajpanchoo on October 24, 2009, 01:29:31 pm ---NO 13
13 The diagram is the speed-time graph of the first 20 seconds of a motorcyclist’s journey.
Speed
(a) Calculate the motorcyclist’s retardation during the final 8 seconds.
(b) Calculate the distance travelled in the 20 seconds.


--- End quote ---

use the formula

v = u+at

s=ut + 0.5at2

toobeerajpanchoo:
ALRIGHT  :)

astarmathsandphysics:
a)The final 8 seconds is a triangle base 8 height 30
area= 0.5bh=0.5*8*30=120m
b) cut up the first 12s into a triangle base 8 and height 15 so area =0.5*8*15=60
and trpezium a=15 b=30 h=4
0.5(a+b)h =0.5*(15+30)4=90
total area =60+90+120=270m

sasukeuchiha:
please give me the answer of o levels physics October/November 2008 mcq paper 1 question no. 23
please give an explanation too
http://www.freeexampapers.com/FreeExamPapers.com_.php?__lo=TyBMZXZlbC9QaHlzaWNzL0NJRS8yMDA4IE5vdi81MDU0X3cwOF9xcF8xLnBkZg==

Navigation

[0] Message Index

[#] Next page

[*] Previous page