Physics 105
Name: _
Homework 1
Aug.31, 2009
Show some work. For repeated calculations, do at least one sample calculation.
1. Consider a particle having a position given by the function graphed below.
2
3
x(t) = 3.1 - 4.1t + 5.9t - 2.6t
3.5
Position (m)
3
PHY 105
Homework 9
Name: _
November 4, 2009
(Due November 11)
1. A 20-g bead on a frictionless wire (see figure below) is shot from an ideal spring
(k=200 N/m) that was initially compressed 3.0 cm. The bead travels along the wire and
smashes into another
PHY 105 Homework 7
1.
Name: _ October 21, 2009 (Due October 28)
Spherical objects experience an air resistance given by the formula C Av2/2, where C=1/2 and A is the cross-sectional area (a circle with the same radius as the sphere). The density of air is
PHY 105 Homework 10
1.
Name: _ November 11, 2009 (Due November 23)
The pipe shown below has a diameter of 16 cm at section 1 and 10 cm at section 2. Point 2 is open to air. Point 2 is an average of 4.2 m higher than point 1. Oil, which has a density 880 k
PHY 105
Homework 6
Name: _
October 14, 2009
(Due October 21)
1. A 643-g block is placed at the edge of a 2.40 track. The coefficient of kinetic friction
between a block and track is 0.250, while that the coefficient of static friction is
0.300. The track
PHY 105
Homework 5 Part B
Name: _
September 30, 2009
(Due October 12)
1. A 5.00-kg block being pulled by a tension of 20.0 N at an angle of 50 above the
horizontal moves to the right with a constant speed of 1.20 m/s for an interval of
10.0 s. For this in
PHY 105
Homework 3
Name: _
September 16, 2009
1. Suppose the position is given as follows
[x(t), y(t)] = [ 0.20 cos ( 0.30 + 0.40 t ), 0.20 sin ( 0.30 + 0.40 t )]
where the distances are measured in meters and the time measured in seconds. Find the
positi
PHY 105
Homework 8
Name: _
October 28, 2009
(Due November 4)
1. A 0.350-kg ball that is hanging by an 80-cm cord from the ceiling is swinging around
in a horizontal circle. It is observed that the ball completes a revolution every 1.15
seconds.
A. What is
PHY 105
Homework 3
Name: _
September 23, 2009
1. Four forces: 20N at 0, 30N at 60, 35N at 170 and 25N at 250 all act
simultaneously on a 250-g mass. Find the acceleration (magnitude and direction)
of the mass.
30N, 60
35N, 170
20N, 0
25N, 250
2. A basebal
PHY 105
Homework 5 Part A
Name: _
September 30, 2009
(Due October 7)
1. The four forces listed below are the only forces acting on an object that does not
move over a period of time.
F1:
(F1X= 2.5, F1Y= - 0.8)
F2:
F2X= - 0.5, |F2|=2.4 in Quad. 2
F3:
?
F4:
PHY 105
Homework 2
Name: _
September 9, 2009
1. Sliding down a frictionless incline. The formula for the acceleration of object sliding down a
frictionless incline is g sin() where is the angle between the incline and the horizontal. If an
object is relea