Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Chapter 2.3, Problem 1cT
Identify all the 
each member of the second pair as 
etc.).
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Fext
N
E
An orange ball is subjected to a constant external force Fext (this force is constant in both
magnitude and direction). The force Fext has a magnitude of 28.6 newtons and it is directed at an
angle theta = 0 = 62.4 degrees north of due east (as shown in red above). While Fext is acting on
the orange ball, somebody else grabs the orange ball and moves it a distance 1.22 meters to the
east and 1.88 meters to the south. Calculate the work (in joules) that Fext did on the orange ball
while it was being moved. (The sign, positive or negative, is important.)
Please referto the figure at the right
side for the following questions:
1.
a. Determine the magnitude of the
resultant force and its direction,
В
30 N
10 kg
measured counterclockwise from
D
positive x- axis of forces OC and OH
only.
b. Resolve force OB into its x,y and z
60°
159
3m
E 70 N
60
50 N /
components, express its force as a
cartesian vector and determine the
4m
300
75 N
coordinate direction angles of the
60 N
Y
K
force OB.
A
4 m
c. Determine the angle between OB
and Ol.
70°
45°
F 65 N
d. Determine the magnitude of the
3 m
resultant forces and its direction
acting in the figure. Sketch your
50 N
80°
80 N
result.
90 N
40 N
In a physics lab, you place a block on the top of a low-friction ramp as shown
above. The block slides down the straight ramp, around a circular part at the bottom, up
a straight ramp on the other side, and then shoots off the end. A, C are on the straight
ramp and B is on the circular ramp (write down all points that apply. Put “none” if
neither point applies)
a) Is the apparent weight of the block less than the block’s weight at any of the points
A, B and C? ____________
b) Is the apparent weight of the block larger than the block’s weight at any of the points
A, B and C? ____________
c) Is the net force on the block zero at any of the points A, B, C and D? _____________
d) Is the tangential acceleration of the block zero at any of the points A, B, C and D?___
Chapter 2 Solutions
Tutorials in Introductory Physics
Ch. 2.1 - Draw a large dot on your large sheet of paper to...Ch. 2.1 - Describe the remaining forces you have indicated...Ch. 2.1 - All forces arise from interactions between...Ch. 2.1 - There are many different types of forces,...Ch. 2.1 - Consider the following discussion between two...Ch. 2.1 - Label each of the forces on your free-body diagram...Ch. 2.1 - Sketch a free-body diagram for a book at rest on a...Ch. 2.1 - A second book of greater mass is placed on top of...Ch. 2.1 - Compare the free-body diagram for the lower book...Ch. 2.1 - Which, if any, Newton’s third law force pairs are...
Ch. 2.1 - A magnet is supported by another magnet as shown...Ch. 2.1 - An iron rod is held up by a magnet as shown. The...Ch. 2.2 - Compare the net force (magnitude and direction) on...Ch. 2.2 - Draw separate free-body diagrams for system A and...Ch. 2.2 - Is the magnitude of the force exerted on system A...Ch. 2.2 - D. Identify all the Newton's third law...Ch. 2.2 - Rank the magnitudes of the horizontal forces that...Ch. 2.2 - Suppose the mass of each brick is 2.5 kg, the...Ch. 2.2 - Describe the motions of systems A and B. How does...Ch. 2.2 - Compare the net force (magnitude and direction) on...Ch. 2.2 - Draw and label separate free-body diagrams for...Ch. 2.2 - Consider the following discussion between two...Ch. 2.2 - Rank the magnitudes of all the horizontal forces...Ch. 2.2 - Compare the magnitude of the netforce on system C...Ch. 2.2 - Draw and label a free-body diagram for system C....Ch. 2.2 - At right is a free-body diagram for a cart. All...Ch. 2.3 - Describe the motions of block A, block B, and the...Ch. 2.3 - On a large sheet of paper, draw a separate...Ch. 2.3 - Identify all the Newton's third law...Ch. 2.3 - Rank, from largest to smallest, the magnitudes of...Ch. 2.3 - Consider the horizontal components of the forces...Ch. 2.3 - If the motion of the blocks is the same as in...Ch. 2.3 - Suppose the mass of the string that connects...Ch. 2.3 - A string exerts a force on each of the two objects...Ch. 2.3 - If you know that the net force on a massless...Ch. 2.3 - Predict the subsequent motions of objects A and B...Ch. 2.3 - Draw separate free-body diagrams for objects A and...Ch. 2.3 - Predict: • what will happen to object C when it is...Ch. 2.3 - Draw and label separate free-body diagrams for...Ch. 2.3 - The weight of a 200 g mass has magnitude...Ch. 2.3 - Consider the following statement about the...
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