Understanding Inertia and Car Safety Devices

The video explains the Law of Inertia, which states that objects maintain their state of motion unless acted upon by an external force. It highlights two car safety devices that protect against inertia: seatbelts and headrests. Seatbelts prevent forward motion during a collision, while headrests prevent whiplash by supporting the head when the car is hit from behind.

What does the Law of Inertia state about the motion of objects?

• Objects will change their motion on their own.

• Objects will maintain their state of motion unless acted upon by an external force.

• Objects will always remain stationary.

• Objects will always move in a circular path.

What happens to a moving object if no external force is applied?

• It will change direction.

• It will accelerate.

• It will stop immediately.

• It will continue moving at the same speed.

How does a seatbelt protect you during a car accident?

• By making the car more aerodynamic.

• By increasing the speed of the car.

• By providing a force to stop your body's forward motion.

• By stopping the car from moving.

What is the primary function of a seatbelt in a vehicle?

• To keep the driver comfortable.

• To enhance the car's speed.

• To prevent the body from hitting the windshield.

• To improve fuel efficiency.

Why is a headrest important in a car?

• To provide comfort during long drives.

• To keep the car's interior stylish.

• To prevent the head from snapping back during a rear-end collision.

• To improve the car's aerodynamics.

What happens to your head when your car is hit from behind?

• It stays still due to inertia while the body is pushed forward.

• It moves forward immediately.

• It spins around.

• It moves backward immediately.