6
THE LEVER
A lever is a simple machine used to
raise or move an object; it consists of
a rigid beam that can pivot on a fixed
point, called the fulcrum. The side on
which the load to be moved is located
is called the load arm. The other side,
on which the moving force is applied,
is called the force arm.
These tools and toys take advantage
of the fact that you can generate a
great force by exercising a small force
if you move farther away to do so.
THE ANCHOR PIN LEVER
The anchor pin lever in your
experiment kit also uses a lever
like this so that you can take the
components apart more easily. The
pivot point is between the two lever
arms, so we call it a “double-sided
lever.”
In this case, the wheel of the
wheelbarrow is the pivot (fulcrum)
of the lever. The two lever arms
constitute the distance to the center
of gravity of the load and the distance
to the hold point of the wheelbarrow.
Because both lever arms are on the
same side, this type of lever is called
a “one-sided lever.” But the principle is
the same as with the anchor pin lever!
››› Everyday examples include
seesaws, crowbars, and wrenches.
››› A wheelbarrow uses a different
kind of leverage to reduce the
amount of force needed to lift
a load.
› › › CHECK IT OUT
Summary of Contents for Alien Robots
Page 10: ...8 1 2 3 4 5 6 7 12 12 19 11 11 x4 x5 ALIEN SNAKE BOT ...
Page 11: ...9 Alien Robots 8 9 10 11 12 11 11 11 11 ALIEN SNAKE BOT ...
Page 12: ...10 C 13 14 15 16 11 11 ALIEN SNAKE BOT ...
Page 13: ...11 Alien Robots A B B part mark position Done B A x2 17 19 20 18 21 ALIEN SNAKE BOT B B A A B ...
Page 20: ...18 OK 14 15 B Hole B A B A 14 15 16 Done B B Hole B A ROLLING DRAGON BOT B A A ...
Page 21: ...19 GRABBER CLAW 11 12 12 100mm axle 30mm axle 1 2 3 5 6 7 8 4 11 12 12 18 19 Alien Robots ...
Page 22: ...20 GRABBER CLAW B B Top view 9 10 11 12 13 A B x2 x2 B A ...
Page 24: ...22 1 2 3 4 5 6 12 11 11 11 11 ALIEN RAPTOR ...
Page 25: ...23 Alien Robots A A 12 11 A A A B B B x2 x2 7 8 9 10 11 12 ALIEN RAPTOR B A ...
Page 28: ...26 B B 6 ROVING DINO BOT 8 9 Hole B 7 8 9 Hole B 11 12 11 11 6 11 11 12 11 8 Hole B 11 7 8 9 ...
Page 31: ...29 PLAYGROUND SWING C 1 2 3 4 5 12 11 11 12 20 Alien Robots ...
Page 35: ...33 8 9 Done A A A B B B BIPEDAL ROBOT 10 Alien Robots ...
Page 36: ...34 1 2 3 4 6 5 x2 11 11 12 12 11 PUMPJACK ...
Page 37: ...35 Alien Robots C B A 11 A B 7 8 9 10 Done PUMPJACK 11 ...
Page 38: ...1 2 3 4 5 11 11 11 11 11 ALIEN FROG BOT 36 ...
Page 39: ...37 Side view Side view 6 7 8 9 19 20 ALIEN FROG BOT B B Alien Robots ...
Page 40: ...38 B Side view Side view B B 10 11 12 13 11 12 A A A A B B ALIEN FROG BOT ...
Page 41: ...39 Alien Robots ALIEN FROG BOT B Side view Side view 14 15 16 12 Done A A B B 17 ...
Page 44: ...555062 03 090119 ...