distance traveled along a path
Velocity
Position: usually x(t), or y(t) for motion along a line.
P1
average speed
medium
fast
slow
A
B
displacement:
s
C
average velocity:
D
E1
E2
On the Tour de France Lite, bicyclists ride straight
south, 8 km/hr for 3 ho
1. Draw pictures and choose a direction for +
angles, rotations.
2. Can use units of rev/sec, deg/sec or rad/s if you
use them for each term in kin. eqns.
3. You must end up with units of radians if you
want to use the equation s=r, v=r and a=r.
R
vcenter
Exam 1 Solutions
1. B Using v f
2
= vo + 2ay you get v f = 2 gy Vf = 188 m/s
2
2. A - use y = v o t +
12
at
2
t = 19.2 s
3. A Distance traveled is equal to the total distance traveled or 3 times the
circumference of the circle. Displacement is the distanc
A From Newtons second law =
, we see that the acceleration of M is biggest, thus after accelerating
over a distance d it will be moving faster, from
=
+2
Exam 2 Solutions
1.
2. C By the work energy theorem, we see
=
and
=
, since the force and distance i
Exam 3 Solutions
1. F This is a conservation of momentum problem. Before she throws the snowball,
the total momentum of the system is 0, therefore, after she throws the snowball the total
momentum of the system must still be 0, so she starts to slide back
Exam 4 Solutions
1. A Both forces cause a torque in the same direction, so
as 2 fr = I so f =
= I
I
2r
We can find the angular acceleration using a kinematic
=
which we can rewrite
f o
t
= 12.5 rad / s 2
2
mr 2
Knowing the angular acceleration we get f
Exam 5 Solutions
1. C Here we use the Ideal gas law to make a ratio of the initial pressure and temperature to
the final pressure and temperature
P1 P2
=
T1 T2
but we must remember that this is the absolute pressure (gauge+1atm) over
the absolute temperat
Fall 2008 Physics 105, sections 1 and 2 Exam 2 Colton 2-3669
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3 hour time limit. One 3 5 handwritten note card permitted (both sides). Calculators permitted. No books.
Constants: g = 9.80 m/s2 Quadratic formula: x =
Instructions: Record your answers on the bubble sheet. The Testing Center no longer allows students to see which problems they got right & wrong, so I strongly encourage you to mark your answers in this test booklet. You will get this test booklet back (b
Fall 2009 Physics 105, sections 1 and 2 Exam 2 Colton 2-3669
RED
barcode here Please write your CID here _
No time limit. No notes. No books. Testing Center calculators only.
Constants: g = 9.8 m/s2 but you may use 10 m/ s2 in nearly all cases -11 G = 6.6
Fall 2009 Physics 105, sections 1 and 2 Exam 1 Colton 2-3669
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barcode here Please write your CID_
No time limit. No notes. No books. Testing Center calculators only. All problems equal weight, 60 points total.
Constants: g = 9.8 m/s2 but you may use 10
Fall 2008 Physics 105, sections 1 and 2 Exam 3 Colton 2-3669
RED
Barcode Here Please write your CID_
3 hour time limit. One 3 5 handwritten note card permitted (both sides). Calculators permitted. No books. Constants/some formulas: g = 9.80 m/s2 G = 6.67