science final Flashcards
what was the average speed of the egg drop capsules that did not effectively protect the raw eggs from the roof drop?
17 fps
what are the three major things you have to include in your go-kart written work to get full credit
measurements, how you made it (written), speed (start, curve, straight, ending)
what are 2 ways you gokart could be disqualified during inspection?
too long, over 48 inches, use leaf blowers
energy is the ability to cause
change
a bowling ball striking the pins is a good example of what type of energy
kinetic
which is not a form of potential energy
thermal
the total energy of an object or group of objects due to large scale motions and interactions is called
mechanical energy
which type of energy is the “waste energy” generated when energy is used
thermal energy
which renewable energy source is most likely to produce pollutants when used
biomas
which energy transformation occurs when brakes are used on a bicycle
kinetic to thermal
which type of energy is due to the motion of particles within an object
thermal
before you drop a ball, what type of energy is present
potential
when you stretch a rubber band, you are storing another form of potential energy called
elastic
which is an example of a wheel and avle
a screw driver
what is a good example of a second class lever
wheelbarrow
the point at which a lever pivots is known as a
fulcrum
the mechanical advantage of a pulley system can be calculated by the
number of sections of the rope pulling up on the object
what is the mechanical advantage of an inclined plane
length divided by height
solve for work
(work = force x distance) w = fd
what type of force is a push or a pull on one object by another that is touching it
contact force
what do we call the combination of all forces acting on an object
net force
what do scientists call the gravitational force exerted on an object
weight
the attractive force that exists between all objects that have mass is called
gravity
what type of force resists the motion of two surfaces that are touching
friction
this is usually measured in Kg and consists of the amount of matter an object has
mass
the tendency of an object to resist a change in its motion is called
inertia
if forces acting on an object combine and form a net force of xero you will have
balanced forces
a crumpled up piece of paper that is dropped and falling through the air is experiencing this type of friction
fluid
a push or pull on an object is called what in science
force
define Newtons 1st law of motion in your own words and give an example
if the net force of an object is zero the motion of the object does not change
if you want a ball to turn or stop then it will be at rest - when you drop a ball its at rest
two states besides hawaii and california that have “spacewatch telescopes” to detect approaching asteroids
arizona and new mexico
what is any motion in which an object is moving along a curved path
circular
what do you call the perpendicular force to the direction of circular motion
centripetal
baseball being hit by a bat, a puch being slapped by a stick, a putter tapping a golf ball are all examples of
opposite forces
the product of an object’s mass and velocity is considered
momentum
billiard balls gain the momentum lost by the cue ball, this is an example of
the law of conservation of momentum
define momentum in your own words
especially when moving at a high speed the ability/how fast something can be stopped
what do we call the starting point that describes the location, or position of an object
reference point
the complete description of your position includes
distance direction, and a reference point
how many signals from satellites are typically used to determine the position of GPS
4
the measure of the distance an object travels per unit of time would be a good definition of
speed
what do we call the rate of change of position in which the same distance is traveled each second
constant speed
the speed at a specific instant in time is called
instantaneous speed
the total distance traveled divided by the total time taken to travel that distance is known as
average speed
the steeper lines in a distance-time graph, indicate…
faster speeds
which of these is the best example of displacement in the context of chapter 1
difference between the initial position and the final position
if you travel 65 mph south you have given a measurement of
speed
when a car’s velocity is changing so is the
acceleration
if you know the total distance and the time is takes for an object to travel that distance you can determine
average speed
what is the equation for acceleration
a = final speed - initial speed / time
