Physics Basics
Your WEIGHT on the moon is different from earth. True or False?
True. Weight depends on gravity. Mass remains the same everywhere.
Give an example of circular motion
moon orbiting earth, earth orbiting sun, car on a roundabout, carousels/merry go rounds, stone tied to a string being swung around in a circle
Why is friction useful?
Prevent excessive sliding/skidding, Used in car brakes, making a fire, slowing things down, stops stationary things from moving, walking
From 2:00pm to 4:00pm, Mr. Newton held up a 100lb box over his head while standing. He did a lot of work! True or False
False!
Is a thermometer used to measure heat or temperature?
Temperature
What is made of atoms/molecules (has mass) and takes up space (volume)?
Matter
Give an example of rotational motion
earth spinning on its axis, spinning top, rotating blades of helicopter, ferris wheel, fan blades, blender, drill machine, spinning figure skater
What is friction?
Contact force. It opposes motion when one surface is being moved across another surface
Give an example of simple machine and explain how it makes work easier
Pulley, Lever, Wheel and Axle, Wedge, Ramp / Inclined plane, Screw
What are the units for temperature. Mention 2 out of the 3 we have learnt
Farenheit, Centigrade / Celsius, Kelvin
What is mass
How much matter is in an object
Give an example of periodic motion.
earth revolving around sun for 365 days, swinging pendulum, rocking chair, rotation of earth very 24h, hands in clock,
How can friction be reduced?
Using oil / grease, using ball bearings or wheels, making a surface smoother
What is work?
When a force is applied to an object, and that object moves / travels a distance
What is a type of energy that is transferred from an object with higher temperature to an object with lower temperature?
Heat
What is the study of matter and how it behaves?
Physics
What is Newton's 3rd law of motion?
Every action has an opposite but equal reaction
What happens when a spring is compressed or stretched?
There will be a spring force which tries to return the spring to equilibrium. It will be in the direction it wants the spring to go (opposite to the compression or stretching)
What is power? (Hint: It has to do with work and time)
How much work is done in certain amount of time
Explain how the liquid in the thermometer shows the temperature?
The liquid (alcohol / mercury) expands due to high temperature, and contracts when the temperature is low. The length of the liquid corresponds to numbers on its sides
How much space an object takes up
What happens to the velocity of an object as it falls?
It accelerates. The velocity increases as it falls (gets faster)
What is the spring constant?
Tells you how stiff a spring is. The higher the spring constant, the stiffer the spring (and vice versa)
What is the ability to do work?
Energy
When heat is added to an object, what happens to the Kinetic energy of its molecules
The Kinetic energy increases (the particles become more active, they collide with each other and the container more)