Projectile Facts
"How To"
Vocabulary
Calculate
100

What is the acceleration in the x direction?

0

100

How do you determine both the magnitude and direction of a resultant vector after adding them graphically?

1. Measure the length with a ruler. Use scale. 

2. Measure the direction with a protractor, give extra meaning by listing the cardinal directions. 

100

A vector has both __________ and _________.

direction; magnitude

100

What is the resultant magnitude of the following vectors: 

15 m North + 16.5 m East

22.3 m at 42.3 degrees N o E.

200

Why is the acceleration in the y direction -9.81 m/s^2?

Force of Gravity

200

How do you determine if a projectile motion problem is symmetrical? 

If it mentions starting and landing at the same height as launch.

200

Is displacement a vector or scalar quantity?

Vector

200

What is the x component of the following vector: 


15m/s at 60 degrees W of N

-12.99 m/s

300

What piece of information, other than ax and ay, is easily filled in when solving a horizontal launch problem?

Viy = 0m/s

300

How do you find the x and y components of a vector, given the hypotenuse and angle?

1. Determine O, A, H

2. Use SOH CAH TOA

300
Projectile motion occurs when an object is thrown or launched and only subject to which force?

Gravity

300
A projectile is launched at 20m/s at 30 degrees above the horizontal. It is determined that this launch is symmetrical. How long does it take for this projectile to reach its highest point?

1.02s

400

Velocity always stays constant in which direction: x or y?

X

400

Imagine you are adding vectors using a component table. Once you sum the values in the x and y, how do you finish the problem?

1. Draw a new triangle.

2. Use pythagorean theorem to find the magnitude and SOHCAHTOA to find the direction. 

400

What is the magnitude of the following vector: 

14.9 m E

14.9 m

400
Use desmos or a graphing calculator to determine the positive solution to the following equation: 


-12 = -4.905t^2 + 3.14t

1.917s

500

What is true about the highest point in an object's motion?

Vertical velocity is 0.

500
When solving a projectile motion problem, you fill in equation 3 hoping to solve for t. You realize you cannot solve this by hand, and instead you need to use the quadratic equation. What must you do to your equation 3 before using the quadratic?

Put it into standard form by doing some algebra to equation 3. 

500

What is the name of the form that is needed to use the quadratic equation? 

Standard Form

500

A marble rolls off a table that is 74 cm high. How far away from the table does the marble land if it travels 1.2m in .92s before it leaves the table?

0.51m

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