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memorize.ai (lvl 286)

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acceleration formula

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Physics

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Last updated

4 years ago

Date created

Mar 1, 2020

Cards (40)

Section 1

(40 cards)

acceleration formula

Front

net force/mass

Back

a heavier sky diver would reach the ground before a lighter one? (true/false)

Front

true

Back

friction affects motion in what ways?

Front

liquids and fluids and solids

Back

Newtons second law

Front

states that the acceleration produced by a net force on an object is directly proportional to the magnitude of the net force

Back

how great is the air resistance that acts on a 10 N sack that falls in air at a constant velocity?

Front

air resistance is the same... 10

Back

when is an airplanes acceleration greatest during takeoff?

Front

just before he lifts off because there is little or no air resistance yet

Back

a regular tennis ball and another filled with sand are dropped off a roof at the same time and air resistance is present. which hits the ground first?

Front

the one that weighs more takes longer to reach terminal velocity and will hit the ground first

Back

does the skydiver fall a greater or lesser distance in second 9?

Front

the ninth bc she is almost at her fastest speed

Back

why doesn't a heavy object accelerate more than a light object when both are freely falling?

Front

the heavier object has more mass and more weight . The lighter object won't have as much weight or mass so you still end up with the same number - 10 m/s

Back

how does an increase in mass affect the acceleration?

Front

an increase in mass will result in a decrease in the acceleration

Back

free fall

Front

it hits no air resistance

Back

in a vacuum a coin and a feather fall side by side. is it correct to say equal forces of gravity act on both?

Front

no, the bowling ball is heavier than the feather and will always be heavier

Back

if two quantities are inversely proportional to each other what does that mean?

Front

that two values change in opposite directions

Back

is acceleration directly proportional to mass or inversely proportional?

Front

inversely proportional

Back

inversely

Front

the two values change in opposite directions

Back

suppose you exert a horizontal push on a crate that rests on a level floor, and doesn't move. How much friction acts compared with the push?

Front

static equilibrium

Back

terminal speed

Front

speed at which the acceleration is zero because friction balances the weight

Back

does air resistance on a falling object increase or does it decrease with increasing speed?

Front

it increases because the faster your going, you hit more air harder

Back

when air resistance equals weight, the object _____ stop moving, it just stops accelerating and remains at a constant speed

Front

doesn't

Back

as an object falls faster and faster there is a point where what?

Front

air resistance is equal to the weight of the object

Back

why does a line man put his body under his opponent and push upwards?

Front

you can put them wherever so you reduce friction- easier to move

Back

if the net force acting on a sliding object is tripled, what happens to the acceleration?

Front

it is tripled too

Back

what causes acceleration

Front

unbalanced forces acting on an object

Back

why does a rocket progressively get easier to accelerate as it travels through space?

Front

the mass is getting smaller because of fuel

Back

when do you produce more pressure on the ground?

Front

standing up

Back

if an object has zero acceleration than it also has what?

Front

zero net force

Back

why does a rocket become easier to travel through space ?

Front

the mass is getting smaller because of fuel

Back

what all does air resistance depend on?

Front

speed and size

Back

when speeding up what direction is acceleration in?

Front

same direction

Back

what is the acceleration of a freely falling object that has reached its terminal velocity?

Front

zero

Back

air resistance

Front

the friction acting on something moving through the air

Back

in a vacuum do heavier or lighter objects weigh more?

Front

heavier

Back

pressure

Front

the amount of force per unit of area

Back

when slowing down what direction is acceleration in?

Front

opposite direction

Back

how does the weight of a falling body compare with the air resistance it encounters just before and after terminal velocity?

Front

they equal out when it reaches terminal velocity but weigh is bigger before.

Back

if the mass of a sliding object is tripled at the same time as the net force, how does the resulting acceleration compare with the original?

Front

it won't change

Back

after the skydiver jumps, she reaches terminal velocity after 10 sec. does she gain more speed durning the first second or the ninth?

Front

she would gain more speed at the first second. she is accelerating more in the beginning

Back

does air resistance play a greater role on a lighter or heavier object and why?

Front

lighter object bc it has less mass so air resistance will cancel out the weight of a lighter object than a heavier object

Back

a skydiver falls faster and faster through the air. does the net force and acceleration increase or decrease?

Front

the net force and acceleration are both decreasing--- air resistance is getting bigger

Back

terminal velocity

Front

constant speed in a straight line

Back