ZeroLaunchAngle 10-18-12 000

8/11/2019 ZeroLaunchAngle 10-18-12 000

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Projectile Motion

Zero Launch Angle

BellworkNotesZero Launch Angle

Finish Video Analysis Lab

Mastering Physics AssignmentExit Pass


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Question 4.2 Dropping a Package

You drop a package from a

plane flying at constant

speed in a straight line.

Without air resistance, the

package will:

a) quickly lag behind the plane while

falling

b) remain vertically under the planewhile falling

c) move ahead of the plane while

falling

d) not fall at all

Bellwork


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You drop a package from a

plane flying at constantspeed in a straight line.

Without air resistance, the

package will:

a) quickly lag behind the plane while

falling

b) remain vertically under the planewhile falling

c) move ahead of the plane while

falling

d) not fall at all

Both the plane and the package have the

samehorizontalvelocityat the moment of

release. They will maintainthis velocity in

thex-direction, so they stay aligned.

Follow-up: what would happen if air resistance is present?

Question 4.2 Dropping a Package


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Zero Launch Angle

Launch angle: direction of initial velocity with respect to

horizontal


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4-3 Zero Launch Angle

This is the trajectory of a projectile launched horizontally:


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Zero Launch Angle

In this case, the initial velocity in the y-direction is zero. Here are

the equations of motion, with x0= 0 and y0= h:


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Zero Launch Angle

In this case, the initial velocity in the y-direction is zero. Here are

the equations of motion, with x0= 0 and y0= h:

Use these equations todevelop an equation

for how the X and Y

positions are related


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Zero Launch Angle

Eliminating tand solving for yas a function of x:

This has the form y= a+ bx2, which is the equation of aparabola.

The landing point can be found by setting y= 0 and solving

forx:


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Take Out Video Analysis Handout

Under Analysis/Questions

Lets work on #5 in Lab Groups

Then well work on #s 3 & 4

Based on more general Projectile Motion concepts

Finish last two questions and turn handout in Finish both Paradigm ( Actual Plots ) and Lab handouts

Both will be graded


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Mastering Physics Assignment

Homework grade!!

Chapter 4 (Start NowDue by 2 AM 10/24) Pay attention to what is practice, extra credit, etc.

Chapter 5 (Can Start SaturdayDue by 2 AM 10/31)

2% of the 100 is deducted for each day late


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a b dc

Question 4.5 Cannon on the Moon

For a cannon on Earth, the cannonball would follow path 2.

Instead, if the same cannon were on the Moon, where g=1.6 m/s2, which path would the cannonball take in the same

situation?


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a b dc

The ball will spend more

timein flight because

gMoon< gEarth. With more

time, it can travel farther

in the horizontal

direction.

For a cannon on Earth, the cannonball would follow path 2.

Instead, if the same cannon were on the Moon, where g=1.6 m/s2, which path would the cannonball take in the same

situation?

Follow-up: which path would it take in outer space?

Question 4.5 Cannon on the Moon

ZeroLaunchAngle 10-18-12 000

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