27404 Parallax Inc, 27404 Datasheet - Page 30

• Manufacturer Part Number: 27404
• Description: COMPETITION RING FOR SUMOBOT
• Manufacturer: Parallax Inc

Specifications of 27404

• Accessory Type: Hobby and Education
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: SumoBot®
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

These unit conversions take some practice; here are some tips:
Friction Forces
Figure 1-8 shows the forces at work if you try to slide an object like a block along a flat
surface like a table. The arrows are called vectors, and they indicate the magnitude and
direction of the forces applied. The (W) vector in Figure 1-8 indicates gravity's action on
the book's mass, a downward force on the table. The table responds with an equal and
opposite force, which is typically labeled (N) for normal force. In this case, the term
normal has a special meaning - it's the force that's perpendicular to the contact surface,
and it prevents the block from falling through the table. (F) is the force applied that tries
to slide the block along the table. The forces of friction between the block and the table
(f
If you're not pushing hard enough to make it slide, the force comes from static friction
(f
block starts moving, the slightly weaker force of kinetic friction (f
S
S
). If you have pushed hard enough to overcome the force of static friction and the
or f
√
√
√
√
√
8
oz
k
) cause the table to oppose the applied force that's trying to make the block slide.
Find the equality with your desired result units first.
Make it a conversion factor with the desired units in the numerator.
Find equalities with units that link your starting units to your result units.
To make them fractions equal to 1, start by making sure that the denominator of
your first fraction cancels the units of the value you are starting with.
Repeat that until you get to the desired result.
=
=
=
8
8
. 0
oz
oz
2268
×
×
1
16
kg
×
1
lb
1
oz
×
1
×
453
1
lb
6 .
g
×
1000
1
kg
g
Figure 1-8
Forces Acting on an
Object
Forces of friction that
result from pushing
an object along a
level surface
K
) takes over.