Science
Terms
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- How does a spring scale work and what does it measure?
- to measure weight, it measures the force of gravity on an object
- what causes terminal velocity?
- air resistance and friction against the object falling
- acceleration
- when a force is applied to an object (speeding up or slowing down(deceleration)) or change in direction
- sliding friction
- an object is sliding on another object
- why did the hammer and feather land at the same time?
- there is no air resistance
- who might use velocity instead of speed
- weatherman
- force
- a push or a pull in a certain direction
- in which direction does friction act?
- the opposite direction of motion
- rolling friction
- one object rolls with wheels on another object
- mass
- the amount of matter in an object
- terminal velocity
- the highest speed in which you can fall due to air resistance
- gravity
- the force that causes objects pull on each other because of their mass
- velocity
- speed and direction
- the most common reference point
- earth
- why dont action and reaction forces cancel out?
- because there wouldn't be an action and reaction if they were equal
- what are balanced forces?
- the same amount of force is coming from all direction, so it does not move
- spring scale
- something that measures the amount of gravitational pull
- force
- a push or pull in a certain direction
- reaction
- the force that responds from the action
- relationship between; objects; distance between them and mass
- more mass means more gravitational pull; more distance means less gravitation pull
- what determines terminal velocity?
- how much surgace area and mass and object has
- surface area
- the amount of surface space something takes up
- why is the first law also called the law of intertia
- it is the same thing
- newton's 3rd law
- for every action there is an equal and opposite reaction
- constant
- mass is this, it means unchanging
- what does the length of arrows indicate?
- longer = more force; shorter = less force
- friction
- a force in the direction opposite to the direction of motion
- lubricant
- a liquid (usually) that reduces friction
- symbol for the newton
- N
- newton's first law of motion
- an object that is moving or an object at rest will stay at rest unless a force is applied to it
- action
- the force that starts the motion
- how can you reduce friction?
- by using a lubricant or reducing the amount of surface area an object has
- a force is measure by units called
- newtons
- the law of universal gravitation
- all objects have gravity
- speed
- how fast an object moves
- net force
- the overall force
- unbalanced force
- opposite or same direction but forces are unequal
- Newton's 2nd Law
- Mass and force combine to affect the motion of an object
- another word for acceleration
- change in position
- weight
- the measure of the amount of gravity something has
- what resists motion?
- air resistance and friction
- air resistance
- resistance between an object and air
- what do arrows of force indicate?
- they show the amount of force is pushing against an object
- Motion
- a change in position
- in which direction does gravity always pull?
- towards the center of an object
- formula for speed
- distance/time
- reference point
- object against which you compare to decide if an object is moving
- What does a force do to an object?
- keeps and object at rest, in motion, starts an object, or stops
- law of conservation of momentum
- if you begin with 100% you must end with 100%
- inertia
- an object's tendency to keep moving or stay where it is
- strongest type of friction
- sliding
- mass
- the amount of matter in an object
- newton
- the measurement of force
- rocket; action and reaction?
- action: the fire pushed against the air and ground: reaction; the air and ground pushing against the fire causing it to rise
- momentum
- mass and speed