PHYS 205 Midterm: PHYS 206 TAMU Exam3 2008
EXAM
III
Physics
218
Name
Section
Number
USEFUL
INFORMATION
If
f(x)
=
kx
=
nkx’
If
f(x)
=
kx
f(x)dx
=
1
—
A’)
f
2
P
40
.
d=
mv2(2)
—
mv2(i)
If
P
is
conservative:
P.
d=
—[U(i)
—
U(
1
)J
and
9U
F=
ôx
‘
9y
=xF
I=>mjr
DO
NOT
WASTE
TIME
DOING
ARITHMETIC
/
3
1.
(25
points)Derive
the
expressions
for
the
and
g
components
of
the
velocity
and
acceleration.
Document Summary
P40 . d= mv2(2) mv2(i: d= [u(i) u(1)j. 1. (25 points)derive the expressions for the acceleration. and g components of the velocity and. 2. (25 points)a man of mass m1 sits on a sled, mass m2 on the top of a frictionless hill of height h. the sled starts down the hill with an initial velocity vo directed towards the north. Call it vb: at the bottom of the hill the surface is solid ice so that there is no friction. The man jumps off the sled onto another sled, mass m3 which is at rest. The empty sled goes off at an angle 9 with velocity of magnitude v1. 3. (25 points)a massless rod can rotate without friction about a vertical axle. A small mass m1 is fixed to the rod a distance h from the axle. A second small mass m2 is initially a distance s from the first mass, as shown.
