vocab
Newtons laws fill in the blank
levers
speed and acceleration
gravity and motion
100
define the word FORCE
What is a push or a pull
100
newtons laws of ______________
What is motion
100
how many different classes of levers did we learn about?
What is 3 different levers
100
what is the equation for speed.
What is distance/times
100
which scientist of long ago thought that the mass of an object affected how fast it would fall?
What is galileo
200
define the word SPEED
What is the distance the object moves per unit of time
200
newton has __ laws
What is 3
200
what are the three parts of a lever
What is the output force- the input force- and the fulcrum
200
remember that speed in a particular direction is________?
What is velocity
200
what is the actual rate at which objects accelerate towards earth. ( remember units)
What is 9.8 m/sec
300
define the word inhertia
What is the resistence to change in motion
300
acceleration is produced when a _____ acts on a ___
What is force acts on a mass
300
give an example of each of the three classes of levers.
What is scissors bolt tweezers
300
why do we calculate the average speed?
What is because most objects do not travel at a constant speed
300
upon what two factors does an amount of air resistance on an object depend.
What is shape and size
400
define the word momentum
What is the characteristic of a moving object that is related to the mass and the velocity of the object
400
an object at rest will remain at rest unless acted upon by a/an __________ force.
What is unbalanced force
400
the lower arm acts like a __ class lever when it bends at the elbow.
What is 3rd class lever
400
what is the change in speed or direction. (usually expressed in m/s/s or m/s squared)
What is acceleration.
400
give an example of why it can be a good thing that falling objects reach a terminal vilocity
What is the fact that a hail stone can fall at 350 m/s
500
what does the law of conservation of momentum state?
it states that in the absence of outside forces like friction, the total momentum of objects that interact does not change
500
for every action there is an equal but __________ reaction.
What is opposite
500
what were the 3 of the five levers mentioned in the activity we did in class
What is light switch baseball bat scissors toilet handle toilet lid
500
solve this equation: what is the speed of a car that travels 823km in 6 hours?
What is 164.6 speed=distance/time 823/6 =164.6
500
why is it incorrect to say that skydivers are in free fall before they open there parachutes?
What is free fall only happens with air resistance.
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