PIry
2O2O
Homework Set
Filt2074
f5
Name:
Due: At the sta,rt of class on Monday, Sep 22,2014. (Not
5 minutes after the sta,rt of class.)
If you just give an answer without showing how you arrived at that
answer, then you will
get no credit for the problem.
1' A block of mass rn starts from rest at the top of an inclined plane
fi.t 5,*
while the block is sriding down the frictionress
as shown below.
l\
"|?}
(a) What is the magnitude of the normal force on the block? Give your
answer in
terms of m, g a,nd the dimensions of the inclined pla.ne.
(b) What
is the acceleration? Give your answer in terms
of the inclined plane.
of.
m, g and the dimensions
(c) What is the speed of the mass at the bottom of the incline? Give a numerical
answer, with the proper units.
m and rn. are tied to her with strings and a,rranged with
two of them on a table top, and the third dangling over the edge of the desk
iritn tnu
string nurning ffu'errgh a massless pulley as shown in the diagram below. Give
all of
your alrswers in terms of. m and g.
2. Three ma^sses' of mass 2m,
(a) what is the acceleration of the mass da.ngling over the
edge?
(b) What is the tension, fi?
(c) What is the tension,
?2?
(d) Now, we switch the order of the masses on the table, so that nr is on the left and
2m is on the table to the right. Now what is the tension
,?2, of the string on the
left?