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Day 20 3/1/11 Topic: 2Dimensional Motion Objective: I can differentiate between the horizontal and vertical components of a projectile. Starter:

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Agenda Starter Starter Review Quiz Review Quiz Take Notes Take Notes Angular Trajectories PF 5.1 Angular Trajectories PF 5.1

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Question 1 1. What are the 2 components of projectile motion. a) Range and trajectory b) Gravity and free fall c) Parabola and arch d) Horizontal and vertical

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Question 2 2.What is the velocity of an object after 3 seconds? (g=9.8 m/s 2 ) a) 4.9 b) 9.8 c) 19.6 d) 29.4

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Question 3 3.What factor would most affect range a projectile travels. a)volume b) angle of launch c) mass d) All of the above

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Question 4 4. Consider 2 masses (planets). If the mass of 1 planet is doubled, how is the gravitational force between them affected? a)Increase by 1/2 b) Double c) Tripled d) Quadrupled

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Question 5 5. Calculate the gravitational force of the 2 planets below: 2.5Kg r=3m a) 4.58 b) 2.67 c) 1.53 d) 3.0 5.5kg Looking For: Given: Relationship: Solution:

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Question 6 6.Calculate the gravitational force of the planets below: 50kg55kg R=12m a) 229 b) 8.75 c) 15.0 d) 19.1 Looking For: Given: Relationship: Solution:

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Question 7 7.Fill in -- The horizontal and vertical components of projectile are_________. a) Independent of each other b) Dependent upon each other c) Equal to each other d) Opposite of each other

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Question 8 8.The __________ traveled in a curved path before hitting the ground. a)Trajectory b)Projectile c)Range d)Parabola

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Question 9 9. A boulder rolls off a cliff with a initial velocity of 10m/s. What is its horizontal distance if it hits the ground 4s later? a) 10 b) 19.6 c) 29.4 d) 40 Looking For: Given: Relationship: Solution:

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Question 10 10. From #9. What was the vertical distance after 4s? a) 9.8 b) 39.2 c) 78.4 d) 156.8 Looking For: Given: Relationship: Solution:

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Vertical Position v Horizontal Position Yields a Parabola Horizontal Velocity is CONSTANT Vertical Velocity is CHANGING b/c gravity accelerates it downward.

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Begin PF 5.9 A stuffed toy is launched in a trajectory, as shown in the diagram. Draw horizontal and vertical motion diagrams. Include position and velocity.

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