Qualification > Sciences

Physics CIE help

<< < (15/24) > >>

halosh92:

--- Quote from: halosh92 on April 23, 2010, 10:23:24 am ---M1 edexcel maths
2003 nov
q2 b ,c

--- End quote ---
could someone answer this please????? ??? ??? ??? ???

astarmathsandphysics:
When I get home in 3 hours

astarmathsandphysics:
b) -28800=m(v-u)=2000(v-12)
v-12 =-28800/24000=-1.2 so v=10.8
c)impulse on T is 28800 from Newton's 3rd law
28800=m(v-u)=m(3.6--6)=9.6m so m=28800/9.6=3000Kg

halosh92:

--- Quote from: astarmathsandphysics on April 23, 2010, 08:06:17 pm ---b) -28800=m(v-u)=2000(v-12)
v-12 =-28800/24000=-1.2 so v=10.8
c)impulse on T is 28800 from Newton's 3rd law
28800=m(v-u)=m(3.6--6)=9.6m so m=28800/9.6=3000Kg

--- End quote ---

for c they say it doesnt change direction..so shouldnt 6 be positive?

astarmathsandphysics:
The 6 is to the left (west) so negative

Navigation

[0] Message Index

[#] Next page

[*] Previous page