Momentum: Physics and Road Safety Quiz

What is the average number of deaths per day due to road accidents worldwide?

• 3,287

• 37,000

• 20-50 million

• 2.35 million

What is momentum?

• The force exerted by a moving object

• The amount of energy an object has

• A vector quantity that has both magnitude and direction

• The speed of a moving object

How is momentum (p) calculated?

• p = m + v

• p = m / v

• p = m × v

• p = m - v

According to Newton's first law, what will happen to a moving object if no external force acts on it?

• It will stop immediately.

• It will change direction.

• It will keep its momentum.

• It will slow down gradually.

What happens to the total momentum of two objects in an isolated system after they collide?

• The total momentum of the two objects increases.

• The total momentum of the two objects decreases.

• The total momentum of the two objects remains the same.

• The total momentum of the two objects is zero.

What is impulse a product of according to the text?

• Force (F) and velocity change (Δv)

• Mass (m) and velocity change (Δv)

• Force (F) and time (t)

• Mass (m) and time (t)

Which equation represents the impulse experienced by an object?

• I = F × t

• Δp = m × Δv

• F × t = m × Δv

• All of the above

What is the main reason airbags and seatbelts are used in vehicles?

• To increase the force experienced by passengers

• To decrease the time over which force is experienced

• To lengthen the time over which force is experienced

• To instantly stop the vehicle during a crash

What would likely happen to a passenger without any safety features during a vehicle crash?

• They would experience less force

• They would be protected by the vehicle's momentum

• They would experience blunt force trauma

• They would not feel any impact

What is the term used to describe the injuries from striking the dashboard or windshield during a crash?

• Airbag trauma

• Seatbelt injury

• Blunt force trauma

• Momentum impact