90
Friction force interrupts wheel's
movement. A ball has only little
friction force because it only touches
the floor slightly.
Right. Let's build a wheel, and play
a race game with the car robots.
Roll over and over~
Oh! The round wheel rolls
so well!
It's a toy car!
Triangle wheel, rectangular wheel...?
I wondered why car wheels
are round.
So, I experimented.
Huh! Triangular and rectangular
wheels cannot roll well...
Why is that?
The reason is so simple. Balls for baseball,
pingpong, and soccer are round.
Ball is round so it can roll
down the stairs.
Friction force?
Hoop and hula hoop roll so
well because they are round.
A ball only touches the floor lightly,
while a triangle and a rectangle touch
the floor with its wide side. So, the
friction force of a ball is just so little.
Since round ball has no sharp corners,
it can roll well.
5. Rolling Bot
Wheels are round.
Summary of Contents for RQ PLUS 110
Page 1: ......
Page 2: ...List BASICS Punching Bot Cultivator Swing Bot Fish Bot Rolling Bot 06 20 40 58 74 90 ...
Page 25: ...27 Step7 Step8 Step 9 Step 10 Tip Tip Double rivet X2 Double rivet X8 ...
Page 31: ...33 Punching Bot ready completion ...
Page 37: ...39 0 02 ...
Page 50: ...52 Cultivator robot ready completion ...
Page 72: ...74 Living under water fish 4 Fish Bot ...
Page 94: ...96 Tip 5 5 frame X1 Double rivet X8 Step 7 X2 Tip 2s rivet X4 Step 8 X2 ...
Page 96: ...98 Tip Tip Double rivet X4 Double rivet X4 Step 11 Step 12 Step8 Step8 ...
Page 103: ...105 0 02 ...
Page 107: ...109 0 02 ...
Page 116: ...118 Step8 Tip Double rivet X2 Step 11 Tip Battery case X1 Double rivet X4 Step 12 ...
Page 118: ...120 Cable connection status Bumper car ready Tip Double rivet X4 Step 15 completion ...
Page 152: ...154 Puppy Bot ready completion ...
Page 175: ...177 0 02 ...