Projectile Motion 1/27/14

Question 0

What is Range in projectile motions?

Answer 0

The total horizontal displacement aka dh

Question 1

What is a projectile?

Answer 1

Any object that..

• experiences only the force of gravity
• does not propel itself in any way
• moves horizontally and vertically
• is in free fall
• and follows a parabolic path

Question 2

What is height in projectile motion?

Answer 2

The maximum vertical displacement which occurs halfway through the flight

Question 3

What is hang time in projectile motion?

Answer 3

Total time from launch to landing

Question 4

What is horizontal motion in projectile motion?

Answer 4

Constant speed

Question 5

What is vertical motion in projectile motion?

Answer 5

Acceleration (due to gravity)

Question 6

How do you find the vh?

Answer 6

Vh = vi(cos)pheta

Question 7

How do you find the vvi?

Answer 7

vvi= vi(sin)pheta

Question 8

In horizontal motion, how do you find the horizontal distance?

Answer 8

Horizontal distamce = the vertical height • time

Question 9

In vertical motion, how do you find the vertical distance?

Answer 9

Vvi•t + 1/2•acceleration•time squared

Question 10

In vertical motion, how do you find the final velocity?

Answer 10

Vvi + acceleration• time = Vvf

Question 11

How do you find the final velocity squared?

Answer 11

Vsquaredvf = Vsquaredvi + 2(acceleration •vertical distance)

Question 12

How do you find the horizontal velocity?

Answer 12

Vh= Vi cos thetha

Question 13

How do you find the initial bertical velocity aka vvi?

Answer 13

Vvi= Vi sin theta

Question 14

In a right triangle what is the initial velocity? Aka Vi

Answer 14

The hypotenuse

Question 15

In a right triangle what is Vvi aka initial vertical velocity?

Answer 15

The opposite

Question 16

In a right triangle what is the horizontal velocity?

Answer 16

The adjacent

Question 17

What is the vertical velocity at the zenith?

Answer 17

Zero

Question 18

What is the value of acceleration?

Answer 18

-9.8 m/s squared

Question 19

What should you do when you are being asked for the maximum height of the projectile?

Answer 19

Only consider half the flight

Question 20

What does newtons 1st law state?

Answer 20

Objects at rest will stay at rest or move at a constant speed in a straight line unless acted on by an unbalanced force

Question 21

What are balanced forces?

Answer 21

Forces acting on an object in opposite directions which add up to zero

Question 22

What does newtons 2nd law state?

Answer 22

That the sum of forces in an object are congruent to its mass times its acceleration; f= ma

Question 23

Define mass

Answer 23

The amount of matter in an object no matter the gravity

Question 24

Define weight

Answer 24

The force due to gravity that depends on what planet you are on in newtons

Question 25

What does newtons 3rd law state?

Answer 25

For every action there is an equla and opposite reaction

Question 26

Define a force

Answer 26

A push or pull with a vector that is measured in newtons

Question 27

What does it mean if an object is in static equilibrium?

Answer 27

That it’s at rest

Question 28

What does it mean if an object is at dynamic equilibrium?

Answer 28

The object is moving at a constant speed in a straight line

Question 29

How do you find weight?

Answer 29

Mass • gravity = W

Question 30

What is specific heat?

Answer 30

The amount of heat required per mass unit to raise the temp 1°C