Understanding Rotational Inertia

Why does adding an orange to the top of a stick make it easier to balance?

• It changes the stick's color.

• It decreases the stick's weight.

• It increases the stick's inertia.

• It makes the stick shorter.

What is the effect of moving mass farther from the axis of rotation?

• It decreases rotational inertia.

• It makes the object spin faster.

• It increases rotational inertia.

• It has no effect on rotational inertia.

Why is it harder to rotate a dumbbell with mass distributed farther from the center?

• Because it has less mass.

• Because it has more rotational inertia.

• Because it is lighter.

• Because it is shorter.

Why do tightrope walkers use long poles?

• To look more impressive.

• To increase their height.

• To increase rotational inertia and balance.

• To decrease their weight.

What happens when a jar of peanut butter rolls down a ramp compared to a jar of water?

• The peanut butter jar rolls faster.

• The water jar rolls slower.

• The peanut butter jar takes longer to roll.

• Both jars roll at the same speed.