Day 20 3/1/11Day 20 3/1/11Topic:Topic: 2Dimensional Motion 2Dimensional Motion

Objective:Objective: I can differentiate between the I can differentiate between the horizontal and vertical components of a horizontal and vertical components of a projectile.projectile.

Starter:Starter:

AgendaAgenda

StarterStarter

Review QuizReview Quiz Take NotesTake Notes

Angular Trajectories PF 5.1Angular Trajectories PF 5.1

Question 1 Question 1

1. What are the 2 components of projectile 1. What are the 2 components of projectile motion.motion.

a) Range and trajectorya) Range and trajectory

b) Gravity and free fallb) Gravity and free fall

c) Parabola and archc) Parabola and arch

d) Horizontal and verticald) Horizontal and vertical

Question 2Question 2

2.2. What is the velocity of an object after 3 What is the velocity of an object after 3 seconds? (g=9.8 m/sseconds? (g=9.8 m/s22))

a) 4.9a) 4.9

b) 9.8b) 9.8

c) 19.6c) 19.6

d) 29.4d) 29.4

Question 3Question 3

3.3. What factor would most affect range a What factor would most affect range a projectile travels.projectile travels.

a)a) volumevolume

b) angle of launchb) angle of launch

c) massc) mass

d) All of the aboved) All of the above

Question 4Question 4

4. Consider 2 masses (planets). If the 4. Consider 2 masses (planets). If the mass of 1 planet is doubled, how is the mass of 1 planet is doubled, how is the gravitational force between them gravitational force between them affected?affected?

a)a) Increase by 1/2Increase by 1/2

b) Doubleb) Double

c) Tripledc) Tripled

d) Quadrupledd) Quadrupled

Question 5Question 5

5. 5. Calculate the gravitational forceCalculate the gravitational force of of the 2 planets below:the 2 planets below:

2.5Kgr=3m

a) 4.58

b) 2.67

c) 1.53

d) 3.0

5.5kg

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Question 6Question 6

6.6.CalculateCalculate the gravitational forcethe gravitational force of the of the planets below:planets below:

50kg 55kgR=12m

a) 229

b) 8.75

c) 15.0

d) 19.1

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Question 7Question 7

7.7. Fill in -- The horizontal and vertical Fill in -- The horizontal and vertical components of projectile are_________.components of projectile are_________.

a) Independent of each othera) Independent of each other

b) Dependent upon each otherb) Dependent upon each other

c) Equal to each otherc) Equal to each other

d) Opposite of each otherd) Opposite of each other

Question 8Question 8

8.8. The __________ traveled in a curved The __________ traveled in a curved path before hitting the ground.path before hitting the ground.

a)a) TrajectoryTrajectory

b)b) Projectile Projectile

c)c) Range Range

d)d) ParabolaParabola

Question 9Question 9

9. A boulder rolls off a cliff with a initial 9. A boulder rolls off a cliff with a initial velocity of 10m/s. velocity of 10m/s. What is its horizontal What is its horizontal distancedistance if it hits the ground 4s later? if it hits the ground 4s later?

a) 10a) 10

b) 19.6b) 19.6

c) 29.4c) 29.4

d) 40d) 40

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Question 10Question 10

10. From #9. What was the 10. From #9. What was the vertical vertical distancedistance after 4s? after 4s?

a) 9.8a) 9.8

b) 39.2b) 39.2

c) 78.4c) 78.4

d) 156.8d) 156.8

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Vertical Position v Horizontal Position Vertical Position v Horizontal Position Yields a ParabolaYields a Parabola

HorizontalHorizontal VelocityVelocity is is CONSTANTCONSTANT

Vertical VelocityVertical Velocity is CHANGING is CHANGING b/c gravity b/c gravity accelerates it accelerates it downward.downward.

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