gaitons
Set 2, Due Tue, Jan 29, 2008 at 23:59
1.
1
. [1 point, 10 tries]
Two rubber bands pulling on an object cause the object to accelerate at 3.50 m/s
2
. What will be the
object's acceleration if it is pulled by 4 rubber bands?
Answer:
7.00e+00 m/s^2
2.
2
. [1 point, 10 tries]
The three ropes shown are tied to a small, very light ring that is stationary. Two of these ropes are
anchored to walls at right angles with the tensions shown in the figure. What is the magnitude of the
tension
T
3
in the third rope, if
T
1
= 34.3 N,
T
2
= 89.2 N, and the lengths of rope 1 and 2 are 2.75 m and
0.190 m, respectively?
Answer:
9.56e+01 N
3.
3
. [1 point, 10 tries]
The tensions of the ropes acting on a 4.40 kg object are shown. Find the value of
a
x
, the
x
component of
the acceleration, if
T
1
=1.20 N,
T
2
=1.00 N,
T
3
=4.90 N,
T
4
=4.30 N, and θ=19.0°?
Answer:
5.38e01 m/s^2 5.38e01 m/s^2
4.
4
. [1 point, 10 tries]
A 61.3 kg box hangs from a rope. What is the tension in the rope if the box is at rest?
Answer:
6.01e+02 N
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5.
5
. [1 point, 10 tries]
A stubborn, 162.0 kg mule sits down and refuses to move. To drag the mule to the barn, the exasperated
farmer ties a rope around the mule and pulls with his maximum force of 833.0 N. The coefficients of
friction between the mule and the ground are μ
s
=0.760 and μ
k
=0.260. What is the net force on the mule?
Answer:
0.0 N
6.
6
. [1 point, 10 tries]
A 7.10 kg object initially at rest at the origin is subjected to the timevarying force shown below. What
is the object's velocity at
t
total
=39.0 s if the maximum force applied in the
x
component,
F
x
, is 54.0 N?
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 Winter '08
 HUGHES
 mechanics, Acceleration, Force, Friction, Mass, kg, tries

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