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Physics

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Heath Smitham

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2y ago
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Cards in this guide (22)
What is the resultant acceleration

Acceleration is a vector, meaning each acceleration has both magnitude and direction. The resultant of vectors is basically the net acceleration on the object expressed as a single vector. For example, if there are two vectors each with a magnitude of 2 meters/(seconds squared) acting on an object and these vectors were placed on the x and y axes then you could represent this system of 2 vectors 90 degrees apart each with a magnitude of two meters/(seconds squared) as one vector of 45 degrees with a magnitude of 2 times the square root of 2 meters/(seconds squared).

What factors determines the strength of the frictional force between two surfaces

how hard the surfaces push to gether the types of surfaces involved

Which two surfaces would have the highest coefficient of friction

rubber on dry concreat

Two vectors which do not lie along the same line represent what kind of motion

Two-dimensional motion

A softball and a ping-pong ball are dropped off of a tall building Which statement describes in what order they hit the ground and why

The softball hits the ground first because it is less affected by air resistance.

Where would a bowling ball and a napkin fall with the same acceleration

In a vacuum chamber. C. On the moon.

Is it bad if you have a heavy period on one month and a light one the next month

No it is not bad, as some ladies have a heavy period for one month and then a light one or they may have two heavy periods and then one light one also.

In free fall all objects fall with the same acceleration

yes and that is 9.8m/s2

true

If an object floats the volume of the displaced water is equal to the volume of the whole object

False - Apex

The force needed to overcome kinetic friction is usually less than that needed to overcome static friction true or false

false

To calculate the density of a substance what two properties do you need to know

Mass, volume~Apex:)

On a spinning ride at the fair it is inertia that keeps you moving in a circle

false

A negative slope on the velocity vs time graph indicates that the object is not accelerating true or false

its false

Watching television with the remote control in your hand which of the following exerts the greatest gravitational force on you

The couch you are sitting on

Lily walked 2 blocks east then 1 block south How would you determine her total displacement

The total displacement will be calculated using Pythagoras theorem. The distance traveled will form the two sides of the triangle. Hence we have to calculate the hypotenuse side using the formula Square root of (2 power 2 + 1 power 2)=Square root(5)=2.23

Liquids that do not mix form into layers when they have different densities true or false

true

How were slaves affected by the new republic

Some northern states made slavery against the law.

How long can you car be parked along freeway before towed

Four hours

Why are some of ancient sport no longer included

i say cause they don't use much technology so they think they are not very as valuable as other Olympic sports

Which of newtons laws represents the equation Fma

Newton's 2nd law is F=ma.

What is the frictional force needed to slow an object in motion.

kinetic frictional

True or false an object buoyant force and weight arent the same thing

true

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