Intro to Physics
What is "physics"?
The study of the physical world. Ex: gravity, forces, atoms, waves, light, sound, etc.
Gravity.
He is known for his studies in motion and his 3 specific laws relating to this.
Sir Isaac Newton
A screw technically encompasses 2 additional simple machines, which two?
Wedge and inclined plane.
Can a sound wave travel through solids?
Yes.
What is the base unit for measuring mass?
A gram.
What is friction?
A force that opposes the relative motion between 2 surfaces.
What fruit is associated with Newton's studies?
Apple.
A handicap ramp is an example of....
Inclined plane.
What causes a sound wave?
Sound waves causing vibrations that make air molecules bump into each other and propagate outward.
Name at least 2 measures of central tendency and what they measure.
Mean - average, Median - middle number of a set, Mode - number most often occurring.
What is the name of the force that pulls an object towards the center in a circular motion?
Centripetal force.
Which of Newton's Laws would be applied to pushing a full shopping cart?
Newton's 2nd Law: The acceleration of an object is directly proportional to the net force applied and inversely proportional to its mass.
Name all 6 simple machines.
TEAMS CHALLENGE:
What is the speed of sound?
Each team gets a guess, the closest wins.
767mph at sea level.
Name the 4 states of matter?
Solid, liquid, gas, plasma.
What is a vector quantity?
A force that has both direction and magnitude.
Which law can be applied to a game of bowling?
Newton's 1st law: An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction, unless acted upon by an unbalanced external force, meaning objects resist changes to their state of motion.
What is the primary simple machine in an elevator?
Pulley.
What is a "sonic boom?"
When the speed of sound is exceeded and the sound barrier is breached...the boom is caused by shock waves being created and sent out.
What are the 3 different temperature scales used worldwide and by scientists?
Fahrenheit, celsius, kelvin.
What is mechanical equilibrium?
When the net force on an object is zero.
What law would apply to this scenario: When you punch a punching bag you usually might feel pain or tension go through your hand after the punch.
Newton's 3rd Law: for every action, there is an equal and opposite reaction
Which class of lever is a wheelbarrow?
Class 2.
Name a type of "wave" on the electromagnetic spectrum that you cannot see.
Ultraviolet, x-ray, gamma rays...