Kim Woods only

1_doc.docx

Home >Science homework help >Kim Woods only

Knowledge Check: Part A

Matter's resistance to a change in motion is called _______ and is directly proportional to the magnitude of matter (mass) of an object. For an object to change its state of motion, it needs a force to be applied to it.

Top of Form

velocity

inertia

distance

area

Bottom of Form

Otherwise, Newton's First Law of Motion says an object will continue to stay at rest or ____________ until a force is applied to it.

Top of Form

uniform speed in a straight line

decreasing speed in a straight line

decreasing speed in a spiral

increasing speed in a straight line

Bottom of Form

A consequence of more mass having more inertia is that ______________ is required to bring the helicopter to the same speed as the bullet.

Top of Form

less force

the same force

more force

the One ring

Bottom of Form

Neo and the agent stand in different locations and the length of the line between them (their distance apart) is a measurement of _________.

Top of Form

space in one dimension

space in two dimensions

space in three dimensions

space in four dimensions

Bottom of Form

The ratio of the distance a bullet travels to the amount of time it takes to travel is known as the __________ of the bullet, depending on whether we need to know the direction or not.

Top of Form

distance or velocity

speed or acceleration

force or velocity

speed or velocity

Bottom of Form

To make the jump, Neo and Morpheus have pushed against their respective launch points with their legs applying a __________ to the launch points.

Top of Form

distance

dimension

equilibrium

force

Bottom of Form

With that push they have accelerated their masses, which means they have ____________ of their bodies.

Top of Form

changed the velocity

changed the masses

changed the internal structure

changed the color

Bottom of Form

The larger the push, the larger the change in velocity. This is an example of Newton's Second Law of Motion that states the acceleration an object experiences is ______________.

Top of Form

directly proportional to the mass of an object

directly proportional to the force applied to it

inversely proportional to the force applied to it

unrelated to the force applied to it

Bottom of Form

Neo and Morpheus's masses have gained a non-zero velocity which means their momentum is now _________.

Top of Form

zero

non-zero

negative

unrelated to velocity

Bottom of Form

Their total momentum (Neo and Morpheus's momentum added together) before the collision is __________ their total momentum after the collision, so momentum is conserved.

Top of Form

less than

the same as

greater than

unrelated to

Bottom of Form

The bullet's horizontal velocity and vertical velocity vectors do not affect each other and are known as ___________.

2 Points

Top of Form

dependent vectors

independent vectors

unit vectors

Victor vectors

Bottom of Form

This means that the speed at which the bullet travels across the earth's surface (it's magnitude of horizontal velocity) does not affect ___________________________.

Top of Form

the speed at which it falls toward the earth

the rate at which it slows down

the distance it will travel

friction from the air

Bottom of Form

The force on a bullet that results from summing all of the forces on that bullet is known as the ______________ of the bullet.

Top of Form

weight force

friction force

net force

gross forceBottom of Form

All forces on the bullets cancel so that the net force on a bullet is zero, which means the bullet has zero acceleration and is in a state known as _________.

Top of Form

collision

equilibrium

denial

Pennsylvania

Bottom of Form

Since the bullets also have zero velocity, a more exact description of the bullet's state would be ______________.

Top of Form

static equilibrium

dynamic equilibrium

elastic collision

inelastic collision

Bottom of Form

Earth's gravity attempts to change the velocity of all objects on Earth's surface toward ___________ at a rate of 9.8 meters per seconds squared.

Top of Form

outer space

the sun

the horizon

the center of the Earth

Bottom of Form

The weight of an object is the force generated by Earth's gravity accelerating the object's _________.

Top of Form

distance

mass

time

destiny

Bottom of Form

When Trinity pulls on the rope with her weight force, Newton's Third Law of Motion tells us that the rope will ________________________.

Top of Form

pull on Trinity with lower force

pull on Trinity with an equal and opposite force

push on Trinity in the same direction as her force

pull on Trinity with a greater force

Bottom of Form

The force applied by the rope accelerates Trinity's mass away from the building, but Newton's Second Law of Motion tells us the same force would have produced _________ on the greater mass of the helicopter.

Top of Form

less acceleration

the same acceleration

greater acceleration

infinite acceleration

Bottom of Form

The helicopter was deformed and destroyed in the _______ collision.

Top of Form

elastic

inelastic

mild

distances

near

Bottom of Form

Knowledge Check: Part B

Find a picture from a media source (movies, TV, comics, video games, etc.) that contains at least two different moving objects, one of which is flying through the air. Place the picture in the following diagram template and cite the image using APA format:

Keynote: Week1DiagramTemplate.key

PowerPoint: Week1DiagramTemplate.pptx

If you need help learning how to manipulate the template in Keynote checkout this Lynda.com video series . For a different version of Keynote, power point or other software, just search in lynda.com for other great courses.

If you are unable to open either of the diagram templates for any reason, please use the image below as a guideline in creating your own diagram in another presentation-based software program.

Answer the following questions based on the picture chosen and what you have learned this week.

Define Newton's First Law below.

Top of Form

Bottom of Form

Pick one moving object in your picture.

· What is the object?

· How will the object's inertia affect any change in its velocity?

Top of Form

Bottom of Form

Pick one stationary object in your picture.

· What is the object?

· If a force is applied to move the object, explain how the object’s inertia will affect any intent to change its velocity (or state of motion).

Top of Form

Bottom of Form

Open your diagram template and do the following:

1. Move and resize the red circle so that it is around the moving object with the largest inertia and label it in the key.

2. Move and resize the green circle so that it is around the moving object with the smallest inertia and label it in the key.

Top of Form

Done!

Do not choose this option.

Bottom of Form

Define Earth's gravity AND the acceleration due to gravity(g) on Earth. Include which direction they are pointing.

Top of Form

Bottom of Form

What is the general effect of Earth's gravity on objects?

Top of Form

Bottom of Form

Earth's gravity accelerates objects at 9.8 m/s 2. When the flying object reaches the top of its arc (even if it is not pictured), it has a vertical velocity of 0 m/s.

Ignoring air resistance, what would be the vertical velocity of the object after 1 second?

Top of Form

0 m/s

4.9 m/s

7.3 m/s

9.8 m/s

Bottom of Form

Ignoring air resistance and assuming the object has still not hit the ground, what would be the vertical velocity of the object after 3 seconds?

Top of Form

0 m/s

14.7 m/s

9.8 m/s

29.4 m/s

Bottom of Form

Open your diagram template and do the following:

Move, resize, and rotate the blue arrow so that it shows the magnitude and direction of the gravity acting on the flying object.

Top of Form

Done!

Do not choose this option.

Bottom of Form

What does it mean to say that the vertical velocity and horizontal velocity of a projectile are independent of each other?

Top of Form

Bottom of Form

Does gravity have an effect on the horizontal velocity?

Top of Form

no effect

increases horizontal velocity

decreases horizontal velocity

Bottom of Form

Does gravity have an effect on the vertical velocity?

Top of Form

no effect

increases vertical velocity when the object is moving up

increases vertical velocity when the object is moving down

Bottom of Form

Open your diagram template and do the following:

1. Move, resize, and rotate the purple arrow so that it shows the magnitude and direction of the the flying object's vertical velocity.

2. Move, resize, and rotate the green arrow so that it shows the magnitude and direction of the the flying object's horizontal velocity.

3. Save your diagram as a PDF and upload the completed file below.

Top of Form

Bottom of Form