Qualification > Math
All Mechanics DOUBTS HERE!!!
cashem'up:
--- Quote from: halosh92 on May 05, 2010, 08:10:15 pm ---this is the exact answer:
3.92 m/s
1.5 m
thankyou ;D
--- End quote ---
--- Quote from: halosh92 on May 05, 2010, 08:10:15 pm ---this is the exact answer:
3.92 m/s
1.5 m
thankyou ;D
--- End quote ---
hey halosh i got it..... i initially took g=10 lolzz.....
now we have a diagram something like this
ok now for the first part it will be easier to take the system as a whole
so lets find
the total resisting force
1.Weight is 9.8m
2. downward force due to weight is 0.6x9.8m = 5.88m
3. due to friction is F= 1/4 x 0.8(cos of arcsin0.6) x 9.8m= 1.96m
Total Resisting- 7.84m
Total Forward = 2mg = 19.6m
therefore resultant is
19.6m - 7.84m = 3ma
11.76=3a
a=3.92 m/s2
halosh92:
--- Quote from: ima_shah2002 on May 06, 2010, 08:16:07 am ---hey halosh i got it..... i initially took g=10 lolzz.....
now we have a diagram something like this
ok now for the first part it will be easier to take the system as a whole
so lets find
the total resisting force
1.Weight is 9.8m
2. downward force due to weight is 0.6x9.8m = 5.88m
3. due to friction is F= 1/4 x 0.8(cos of arcsin0.6) x 9.8m= 1.96m
Total Resisting- 7.84m
Total Forward = 2mg = 19.6m
therefore resultant is
19.6m - 7.84m = 3ma
11.76=3a
a=3.92 m/s2
--- End quote ---
thx alot :)
sorry for the trouble
;D ;D
cashem'up:
haha no worries man no worries :P
Sue T:
--- Quote from: Sue T on May 05, 2010, 10:18:25 am ---jan 2007:
can ny1 solve the last question 7(f)?
--- End quote ---
???no1? ???
halosh92:
at 2.p.m. the position vector relative to a lighthouse of ship A is (3i+j)km and its velocity is (-i + 5j)km/h
At the same time ship B has position vector (-i + 4j)km relative to the lighthouse and velocity (2i + 3j)km/h . find, after "t"h
a) the position vector of A relative to the lighthouse.
b)the position vector of B relative to the lighthouse.
c)the position vector of A relative to B.
d) find the time when A is due north of B.
can someone just solve part (d) how to come about such questions wat do they mean exactly?
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