Unit 2 Assessment Remediation
Presentation
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Physics
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9th - 12th Grade
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Practice Problem
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Medium
+6
Standards-aligned
Leslie Dunham
Used 5+ times
FREE Resource
9 Slides • 28 Questions
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Unit 2 Assessment Remediation
Projectile Motion - Motion in 2D
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Vectors and Scalars
Scalar quantities include MAGNITUDE
Vector quantities include MAGNITUDE and DIRECTION
Check out the examples to the right
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Multiple Choice
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Multiple Choice
You are taking a Physics class and hear about a speed that is 35 miles per hour (mph). What is a magnitude and what is the magnitude of 35 mph?
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Adding Vectors
If all of your vectors are in the x direction you can add and subtract them. (same if they were all in the y direction)
If you want to add an x vector to a y vector, you will use Pythagorean theorem.
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Example 1
A dog walks 5 m North and then 6m South.
What is its displacement?
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Example 2
A dog walks 5 m North and then 6m East.
What is its displacement?
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
What is the resultant of the two vectors shown above?
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Multiple Choice
What is the resultant vector of the two labeled vectors?
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Multiple Choice
What is the resultant of these two vectors?
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Horizontally Launched Projectiles
A projectile is any object that is in free fall.
A horizontally launched projectile is an object that has an initial horizontal velocity (the blue ball) before it starts to free fall so it will move both horizontally and vertically at the same time.
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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For all projectiles:
Horizontal velocity remains constant the whole time (look at the vx value in the animation)
Vertical velocity changes because the force of gravity acts on objects vertically causing them to accelerate at 10 m/s/s down (look at the vy value in the animation)
X and Y are INDEPENDENT
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Calculating Horizontal Projectiles
Split up the horizontal and vertical motion
Only TIME will be the same on each side
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Example
A toy car rolls across a table at a constant speed of 3 m/s. The table is 1.2 m tall.
How much time will it take for the car to hit the ground?
What will be the range (horizontal distance) for the car?
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
What is the vertical acceleration of a projectile?
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Multiple Choice
A soccer ball is kicked horizontally off a cliff. What information is needed to find the time to fall?
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Multiple Choice
A cannon is fired horizontally from a 5.0 m tall tower. How much time will it take until the projectile hits the ground?
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Multiple Choice
A cannonball is launched horizontally at 50 m/s from an 80 m tall cliff. How much time will it take to hit the ground?
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Multiple Choice
A cannonball is launched horizontally at 50 m/s from an 80 m tall cliff. How far will it go (horizontally) before hitting the ground?
Unit 2 Assessment Remediation
Projectile Motion - Motion in 2D
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