Science Study Guide

Acceleration

The change in the velocity of an object is defined as its

orbit

An object that is traveling around another body in space is in

Net force

on an object is the combination of all the forces acting on the object

Buoyant force

is the upward force that fluids exert on all matter

700 km/hour

An airplane leaves New York to fly to Los Angeles. It travels 3,850 km in 5.5 hours. What is the average speed of the airplane?

The law of universal graviation says all the bodies attract each other. If you drp a cup, it falls to Earth. Why doesn’t the gravitation attraction between your hand and the cup keep the cup from falling

There is gravitation attraction between you and the cup, but Earth’s gravity is stronger, so Earth’s gravity pulls the cup down

Julia is in a car with her father. The car is undergoing centripetal acceleration. What is happening to the car?

Julia is in a car with her father. The car is undergoing centripetal acceleration. What is happening to the car?

Rajiv made a model of a boat. When he places it in water, it sinks. According to Achimedes’ principle, why does the boat sink?

The buoyant force is less than its weight

Force equals to mass and acceleration

What is the formula F= ma mean, and which of Newton’s three laws does it

Is of how fast spmething goes

the speed of an object

Is the speed of some things given direction

The velocity of an object

The measure of an objects change in velocity

Acceleration of an object

Velocity

Speed in a specific direction

Reference point

A location to which you compare other locations

Speed

A measure of how far something moves in a given amount of time

Position

Describes the location of an object

Using a position and a reference point

What information do you need to describe an objects location

Speed

How would decreasing the time it takes you to run a certain distance affect your speed

Divide it: 60/100 = 2 mls

Juan lives 100 m away from Bill. What is Juan’s average speed if he reaches Bill’s home in 50 s

Distance, time, direction

What do you need to know describe the velocity of an object

Velocity

Acceleration is a change in

Centripecal acceleration

Occurs when an object travels in a curved path

Negative acceleration

A decrease in the magnitude of velocity is called

Meters per second squared or m/52

An increase in the magnitude of velocity is called

Meters per second squared or m/52 !!

The units for acceleration are

V1 is velocity - V2 final velocity

In the equation a = (v2-v1)/t, what do v1 and v2 represent

Direction

Acceleration can be a change in a speed or

From 3:00 - 3:02, from 3:06 to 3:07, and from 3:09 - 3:10

Desrcibe a situation when you might travel at a high velocity, but with low acceleration

A push or a pull

Force

Interia

Resistance of an object to a change in motion

Newton

The unit that expresses force

Action force is your body pushing down and the chair is pushing up

What is the action force and the reaction force when you sit down on a chair

Add forces that act in the same firection, you subtract the smaller force from the larger force when force acts in opposite direction

How do you determine net force

Gravity

Is a force that attracts all matter to each other

Free fall

When the only force affection an object is gravity, that object is in

Orbit

An object traveling around another object in space is in

Increase

The gravitational attraction between two objects will ___ if one object acquires more mass

Decrease

The gravitational attraction between two objects will ____ if the objects move farther apart

Because gravity pulls their mass in a ball

Why are large astronomical bodies such as planets and stars round

A forward + downward motion

What two motions combine to produce an orbit

MASS. measures how much matter an object has WEIGHT is the force of gravity on that mass

Explain the difference between ,ass and weight

Pascal

The S1 unit of pressure

Fluid

A material that can flow and takes the shape of its container

pressure

The amount of force exerted per unit area of a surface

Twig has lower density tham water and pepple has higher desnity than water while water has the most density

A pebbile sinks in water. A twig floats on top of the water. Coampre the desnities of the water, the pebble, and the twig

As you go lower in the atmosphere there is more air above. The weight of the air above is greater, so the pressure is greater

Explain why atmospheric pressure changes as atmospehre depth changes

The bouyant force on an object in a fluid is an upward force equal to the weight of the fluid displaces

What does Archimedes’ principle state

The particles clooide with each other and with the balloon

Describe the motion of air particles inside an inflated balloon

Taking shape of container and the drink flows

What two properties show that the drink is a fluid