PAX PAX Physics Fundamentals 2 — Questions and Answers
Question 1: A ball is dropped from rest. Which best describes its motion as it falls (ignoring air resistance)?
- Constant speed
- Decreasing speed
- Constant acceleration downward (Correct answer)
- Decreasing acceleration
Correct answer: Constant acceleration downward
Gravity causes constant acceleration of approximately 9.8 m/s² downward.
Question 2: What type of wave is sound?
- Transverse wave
- Electromagnetic wave
- Longitudinal wave (Correct answer)
- Surface wave
Correct answer: Longitudinal wave
Sound is a longitudinal wave where particle displacement is parallel to wave propagation.
Question 3: Which of the following is an example of a conductor?
- Rubber
- Wood
- Copper (Correct answer)
- Glass
Correct answer: Copper
Copper is a metal that allows electrons to flow freely, making it a good electrical conductor.
Question 4: If a car travels 150 miles in 3 hours, what is its average speed?
- 30 mph
- 40 mph
- 50 mph (Correct answer)
- 60 mph
Correct answer: 50 mph
Speed = distance ÷ time = 150 ÷ 3 = 50 mph.
Question 5: What is the principle that states energy cannot be created or destroyed, only converted?
- Newton's Third Law
- Law of Conservation of Energy (Correct answer)
- Ohm's Law
- Boyle's Law
Correct answer: Law of Conservation of Energy
The Law of Conservation of Energy states that the total energy in a closed system remains constant.
Question 6: When two objects collide and bounce off each other, this is called a:
- Inelastic collision
- Perfectly inelastic collision
- Elastic collision (Correct answer)
- Gravitational collision
Correct answer: Elastic collision
An elastic collision is one in which both momentum and kinetic energy are conserved.
PAX PAX Physics Fundamentals 2
A ball is dropped from rest.
Which best describes its motion as it falls (ignoring air resistance)?