Video Review Law of Inertia

What is inertia?

• The force that causes objects to move.

• The resistance of an object to a change in its motion.

• The speed at which an object changes direction.

• The amount of energy an object possesses.

Why do you feel a jerk forward when a car suddenly brakes?

• The car's engine pushes you forward.

• Your body's inertia tries to maintain its forward motion.

• The seatbelt pulls you forward.

• Air resistance pushes you forward.

What property of an object directly influences its inertia?

• Its color

• Its temperature

• Its mass

• Its volume

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How do seismometers use the principle of inertia to detect earthquakes?

• They measure the change in temperature caused by an earthquake.

• They use a static mass that resists movement, allowing a pen to record ground motion.

• They detect changes in air pressure during an earthquake.

• They use a rapidly spinning wheel to sense vibrations.