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# force and motion

what is newtons first law? A law created by Sir Issac newton that states and object at rest stays at rest an object in motion stays in motion at a constant velocity, unless a net force acts on it. When forces act on an unbalanced object causes a change in velocity.
what is velocity? the speed and direction in an oject
what is acceleration? The change in speed and or direction of an object
What is the difference between velocity and acceleration? Velocity is the speed and direction of an object, acceleration is a change in the speed or direction.
what is an independent variable? the variable that changes in an experiment and may affect the dependent variable.
You are going on a bike at 7 miles per hour east, you turn around and begin going up a hill at 4 miles per hour north, what is this an example of? Why? acceleration because you are changing speed and direction
you are doing an experiment to see what will clear up your skin the best. You use the same moisturizer in each, but you use two different face washes. You use your regular face wash and a new one with crystals. What is independent and dependent independent is type of face wash dependent: skin
what is newtons second law? am=f force equal acceleration times mass
a ball is pushed with a force of 5 newtons, the ball goes 2m/s what is the mass of the ball? 5N=2m/s x 2.5 kilograms
a soccer ball travels at a rate of 6m/s, the mass of the soccer ball is 2 kilograms; what is the initial force applied? F= 6m/s times 2kg 12 newtons
draw a force diagram to represent the following: a ball is pushed down a bowling alley with 5 newtons of force | 5N---------------->0<------friction ^
what is newtons third law? for every action, there is an equal and opposite reaction
what is an initial force? the original push or pull given to an object
what force pushes a ball down onto a table? gravity
you are running a mile race and you want your average pace to be 3.5m/s. about how long would it take you to run a mile at this pace? about 7.5 to 8 minutes
you are trying to see how eating chocolate frosted dunkin donuts will help you gain weight for a wrestling championship versus eating hostess cupcakes. What is your independent and dependent variable? Independent= type of food eaten dependent= weight gain
when an object has a larger mass and the same force applied as a smaller mass, how will the acceleration compare? The greater the mass the less the acceleration
Two objects have the same masses. One gets a 2N force and the other gets a 5N force, which will go further? the greater the force the greater the acceleration
if there was no gravity and you threw a ball what would happen? it would never stop going/ hit the ground
an object is at rest, if no forces are applied what will happen? it will stay at rest because of newtons first law
why is it important to only test one variable at a time? so you will know what caused your result
what are constants? things that do not change in an experiment
if you are testing how fast a ball will roll if you only change the mass of the ball what would remain constant? the surface of the ball, the initial force and the way the ball is being used.
what is the "big fat hairy deal" mass, surface type, initial force, and many other things affect the motion of an object. Newtons first law states that objects in motion stay in motion, objects at rest stay at rest unless a greater force acts on it. force is equal to acceleration x mass.
if a ball keeps moving at a constant rate is it balanced or unbalanced? it is balanced because the same forces are acting on it
if an object is not moving is it balanced or unbalanced? it is balanced because the same force is acting on it
an object is not moving and it pushed, is this balanced or unbalanced? unbalanced
what is an unbalanced force a movement of an object, a change
what is a balanced force the same forces acting against an object, not changing