physics............

Subject: physics............ Thu Jan 13, 2011 1:29 pm

1.an elastic string has lenght a when tension in it is 4N.its lenght is b when tension is 5N.what will be the length if it is subjected to tension of 9N
a.a+b
b.b-a
c.5b-4a
d.(a+b)/(a-b)

2.two blocks of mass m and M are connected to each other thru a horizontal spring.if we push the mass m wid horizontal force F which causes acceleration A in mass m ,then accleration of M will be
a.F/M
b.F/(m+M)
c.A
d.(F-mA)/M

Subject: Re: physics............ Fri May 18, 2012 10:13 pm

rishika01 wrote:: 1.an elastic string has lenght a when tension in it is 4N.its lenght is b when tension is 5N.what will be the length if it is subjected to tension of 9N
a.a+b
b.b-a
c.5b-4a
d.(a+b)/(a-b)

2.two blocks of mass m and M are connected to each other thru a horizontal spring.if we push the mass m wid horizontal force F which causes acceleration A in mass m ,then accleration of M will be
a.F/M
b.F/(m+M)
c.A
d.(F-mA)/M

in part A you does't mentioned that when we apply 9 newton force after removing of 4n and 4N force. if yes then the ans will be defiantly a+b.
in second part same acceleration will produced when we push the block of mass m
thanks.. you can also consult http://www.notes4all.com for further physics problems. i get also alot of benefit from this informative site. thanks

Subject: Re: physics............ Fri May 18, 2012 10:13 pm

rishika01 wrote:: 1.an elastic string has lenght a when tension in it is 4N.its lenght is b when tension is 5N.what will be the length if it is subjected to tension of 9N
a.a+b
b.b-a
c.5b-4a
d.(a+b)/(a-b)

2.two blocks of mass m and M are connected to each other thru a horizontal spring.if we push the mass m wid horizontal force F which causes acceleration A in mass m ,then accleration of M will be
a.F/M
b.F/(m+M)
c.A
d.(F-mA)/M

in part A you does't mentioned that when we apply 9 newton force after removing of 4n and 4N force. if yes then the ans will be defiantly a+b.
in second part same acceleration will produced when we push the block of mass m
thanks.. you can also consult http://www.notes4all.com for further physics problems. i get also alot of benefit from this informative site. thanks