Download Bill Nye: Balance

Name: ___________________________
Bill Nye: Balance
1. When we push or pull, we are exerting ___________________.
2. Because the forces are equal and opposite, they are _____________________.
3. When a force makes something move in a circle, we call it a twisting force,
or _________________.
4. You can hold a person in a chair with just your ______________.
5. In order to stand up, you need to lean far enough forward to get your center
of _________________ over your feet.
6. Everything, no matter its size or shape, has a __________________ of
_____________________.
7. No matter how an object is __________________, it always has a balance
point.
8. If an object is round, its balance point is always in the _____________________.
9. If you push above the center of mass on an irregular shaped object you get
a twisting force, and the object _________________ over.
10. Humans use three main sensors for balance. They use their eyes, their
___________ ear, and their muscle and joint sensors.
11. When forces are unequal they are out of ____________________.
12. A lot of people carry heavy things on their head. This is because the center
of gravity of you and the object are in a straight _____________________ and
it’s easy to keep your balance.
13. The counterweight of an elevator weighs the same as the
_____________________. This makes it so that the motor does not have to do
all the work to lift the elevator.
14. When you use a tool with a handle you make unbalanced
____________________. You see, tools use torque.
Name: ___________________________
Answer Key
Bill Nye: Balance
1.
When we push or pull, we are exerting ____forces_________.
2.
Because the forces are equal and opposite, they are
____balanced________.
3.
When a force makes something move in a circle, we call it a twisting
force, or ____torque_______.
4.
You can hold a person in a chair with just your __thumb_______.
5.
In order to stand up, you need to lean far enough forward to get your
center of __gravity________ over your feet.
6.
Everything, no matter its size or shape, has a _____center_______ of
____gravity__________.
7.
No matter how an object is ____shaped________, it always has a balance
point.
8.
If an object is round, its balance point is always in the
_middle/center______.
9.
If you push above the center of mass on an irregular shaped object, you
get a twisting force, and the object _____falls/tips_____ over.
10. Humans use three main sensors for balance. They use their eyes, their
__inner____ ear, and their muscle and joint sensors.
11. When forces are unequal they are out of ___balance__________.
12. A lot of people carry heavy things on their head. This is because the center
of gravity of you and the object are in a straight _______line__________
and it’s easy to keep your balance.
13. The counterweight of an elevator weighs the same as the
______elevator_______. This makes it so that the motor does not have to
do all the work to lift the elevator.
14. When you use a tool with a handle, you make unbalanced
____forces__________. You see, tools use torque.