Phys101
Final082
Zero Version
Coordinator: Naqvi, A.A.
Tuesday, June 23, 2009
Page:
1
Q1.
A uniform horizontal beam of length 6.00 m and mass M = 100 kg is attached to the
vertical wall by a rope making an angle
θ
= 60.0 º with the wall; the beam can rotate
about the fixed pivot O as shown in Fig. 1.
A mass m = 80.0 kg hangs from P at a
distance 4.00 m from O. Find the tension in the rope attached to the wall.
A)
2.03 x 10
3
N
B)
5.33 x 10
2
N
C)
1.11 x 10
3
N
D)
3.25 x 10
3
N
E)
4.57 x 10
3
N
Q2.
What increase in pressure is necessary to decrease the volume of a solid aluminum sphere
by 0.050 % (Bulk Modulus of Aluminum = 7.00 x 10
10
N/m
2
)
Sec# Equilibrium and Elasticity

Elasticity
Grade# 50
Q3.
A certain wire stretches 0.90 cm when outward forces with magnitude F are applied to
each of its ends. The same forces are applied to a second wire of the same material but
with two times the diameter and three times the length. The second wire stretches:
A) 0.68 cm
B) 0.30 cm
C) 0.90 cm
D) 2.7 cm
E) 8.1 cm
Q4.
A nonuniform meter stick of mass 200 g is pivoted at the 0 cm mark and balances
horizontally in a vertical plane. In addition to the reaction at the pivot and weight, two
vertical forces are acting on it as shown in Fig. 2.
Find the distance of the center of mass
of the rod from the pivot.
A) 76 cm
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Phys101
Final082
Zero Version
Coordinator: Naqvi, A.A.
Tuesday, June 23, 2009
Page:
2
B) 88 cm
C) 95 cm
D) 61 cm
E) 55 cm
Q5.
Each of the four corners of a square with side a is occupied by a point mass m. There is a
fifth mass, also m, at the center of the square. To remove the mass from the center to a
point very far away the work that must be done by an external agent is given by:
Sec# Gravitation

Gravitational Potential Energy
Grade# 45
Q6.
What is the mass of a planet, in units of Earth’s mass M
E
, whose radius is twice the
radius of Earth and whose escape speed is twice that of the Earth?
Q7.
A spherical shell has inner radius R
1
, outer radius R
2
, and mass M, distributed uniformly
throughout the shell. The magnitude of the gravitational force exerted on the shell by a
point particle of mass m, located a distance d from the center (d < R
1
) is:
A) 0
B) GMm/R
2
2
C) GMm/d
2
D) GMm/R
1
2
E) GMm
/ (R
1
−
R
2
)
2
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '08
 Field
 Physics, Kinetic Energy, Mass, Potential Energy, Velocity, Coordinator, version Page

Click to edit the document details