25 pt.

5 pt.

10 pt.15 pt.20 pt.

25 pt.

5 pt.

10 pt.15 pt.20 pt.

25 pt.

5 pt.

10 pt.15 pt.20 pt.

25 pt.

5 pt.

10 pt.15 pt.20 pt.

25 pt.

5 pt.

10 pt.15 pt.20 pt.

1-5A boat moves normally through the water at a velocity of 5 mph. How fast will the boat be traveling, as seen from shore, going upstream in a river that moves at 3.5 mph?

1-5AA boat moves normally through the water at a velocity of 5 mph. How fast will the boat be traveling, as seen from shore, going upstream in a river that moves at 3.5 mph?

1.5 mph

1-10A plane wants to fly due West, but there is a strong crosswind from the South. Draw a vector diagram illustrating what direction the plane should aim to achieve its goal. Include all important vectors.

1-10AA plane wants to fly due West, but there is a strong crosswind from the South. Draw a vector diagram illustrating what direction the plane should aim to achieve its goal. Include all important vectors.

resultant

planewind

1-15

Which way should the swimmer aim to get to the opposite shore the quickest?

VR

12

3

1-15A

Path #2

Which way should the swimmer aim to get to the opposite shore the quickest?

VR

12

3

1-20A plane travels 100 km/hr due North in a strong crosswind headed 100 km/hr due East. How fast is the plane’s ground-speed?

A) 0 km/hrB) 141 km/hrC) 200 km/hrD) not enough info

1-20AA plane travels 100 km/hr due North in a strong crosswind headed 100 km/hr due East. How fast is the plane’s ground-speed?

B)141 km/hr

1-25A boat needs to move straight across a river. The boat moves at 25 mph relative to the water, and the river is moving at 16 mph as shown. How fast will the boat end up traveling across the river?

River

Boat

?

1-25AA boat needs to move straight across a river. The boat moves at 25 mph relative to the water, and the river is moving at 16 mph as shown. How fast will the boat end up traveling across the river?

16 mph

25 mph

V

162 + V2 = 252

V2 = 252 - 162

V = sqrt(252 - 162)

V = 19.2 mph

2-5A stone is thrown from the top of a cliff horizontally at a speed of 10 m/sec, while at the same time an identical stone is dropped from the cliff. Neglecting air drag, which one hits the ground first?

2-5A

They both hit at the same time

A stone is thrown from the top of a cliff horizontally at a speed of 10 m/sec, while at the same time an identical stone is dropped from the cliff. Neglecting air drag, which one hits the ground first?

2-10Fill in the Blanks:When an projectile is thrown horizontally, before it hits the ground its horizontal speed ______________ and its vertical speed ____________?

2-10AFill in the Blanks:When an projectile is thrown horizontally, before it hits the ground its horizontal speed ______________ and its vertical speed ____________?

remains the sameincreases

2-15A baseball thrown from the pitcher’s mound travels 145 kph before hitting the ground 1.5 sec later. How far (in meters) is it from the mound to where the ball hits?

2-15AA baseball thrown from the pitcher’s mound travels 145 kph before hitting the ground 1.5 sec later. How far (in meters) is it from the mound to where the ball hits?

v =145 km/hr (1000 m/km) (hr/3600 sec) = 40.3 m/sec

d = v t = (40.3 m)(1.5 sec) = 60.4 meters

2-20A dart is fired horizontally from a toy gun at a speed of 30 cm/sec from a height of 0.45 m. How much time passes before the dart hits the ground?

2-20A

dy = (1/2)at2 ==> t = √[2 dy/a]

t = √[(2*0.45m)/(9.8m/s2)]

t = 0.30 seconds

A dart is fired horizontally from a toy gun at a speed of 30 cm/sec from a height of 0.45 m. How much time passes before the dart hits the ground?

2-25A softball is tossed horizontally from a treehouse 4 meters tall, and the ball lands 20 meters from the treehouse. How fast was the ball thrown?

2-25A

dx = vxt anddy = (1/2)at2 ==> t = √(2 dy/a)where dy = 4 mt = √[2(4 m)/(10 m/s2] = 0.894 secv = dx / t = 20m / 0.894 sec = 22.4 m/sec

A softball is tossed horizontally from a treehouse 4 meters tall, and the ball lands 20 meters from the treehouse. How fast was the ball thrown?

3-5A cannonball is launched at a speed of 25.2 m/sec upwards at an angle of 30º above the horizontal. What is the acceleration of the ball in the air?

3-5A

9.8 m/sec2 straight down

A cannonball is launched at a speed of 25.2 m/sec upwards at an angle of 30º above the horizontal. What is the acceleration of the ball in the air?

3-10A water balloon is launched with a horizontal velocity of 10 m/s and a vertical velocity of 8 m/s. What is the velocity of the balloon at the top of its path?

3-10A

10 m/s horizontally.Because the horizontal velocity of a projectile is constant

A water balloon is launched with a horizontal velocity of 10 m/s and a vertical velocity of 8 m/s. What is the velocity of the balloon at the top of its path?

3-15

3-15A

vy = 24 m/s sin Ө = 12 m/sa = ∆v/t ==> t = (vf - vi)/at = (12 m/s) / (10 m/s2) = 1.2 sec

If an object is launched 24 m/s at an angle of 30o, how much time will it take before it reaches the top?

3-20If a ball is launched upwards from the moving cup, as shown, where will it land relative to the cup?

A) in front of the cupB) behind the cupC) inside the cupD) not enough info

3-20AIf a ball is launched upwards from the moving cup, as shown, where will it land relative to the cup?

C) inside the cup

3-25A water balloon is launched at 7.63 m/s at 58.4o above the horizontal. How far (horizontally) does it travel before hitting the ground?

3-25A

vix = vi cosӨ = 4 m/s viy = vi sinӨ = 6.5 m/s

d = viy t + ½ at2 d = 0 a = -10 m/s2

t = 1.3 sec

dx = vxt = (4 m/s)(1.3 sec) = 5.2 meters

A water balloon is launched at 7.63 m/s at 58.4o above the horizontal. How far (horizontally) does it travel before hitting the ground?

4-5What is the horizontal ‘part’ of an angled vector called?

4-5A

The horizontal ‘component’

(x-component)

What is the horizontal ‘part’ of an angled vector called?

4-10Draw this vector, then draw and label the component vectors.

A

4-10ADraw this vector, then draw and label the component vectors.

A Ay

Ax

4-15How can you calculate the vertical component of vector B?

4-15AHow can you calculate the vertical component of vector B?

By = Bsinθ

4-20Vector C has a magnitude of 20 m/s and is at an angle of 30° from the horizontal. What is the vertical component of vector C?

4-20A

Cy = Csinθ Cy = (20m/s)sin(300)Cy = 10m/s

Vector C has a magnitude of 20 m/s and is at an angle of 30° from the horizontal. What is the vertical component of vector C?

4-25Vector D has a magnitude of 80 m and is at an angle of 30° from the vertical. What is the horizontal component of vector D?

4-25A

Dx = Dsinθ Dx = (80m/s)sin(300)Dx = 40 m

Vector D has a magnitude of 80 m and is at an angle of 30° from the vertical. What is the horizontal component of vector D?

5-5How many sides does a circle have?

5-5A

Two… the inside and the outside!

How many sides does a circle have?

5-10Name the character and movie that produced this famous quote:

“Archaeology is the search for fact, not truth.”

5-10AIndiana Jones, in Indiana Jones and the Last Crusade

5-15

On the original Star Trek series, what were the call letters of the Star Ship Enterprise?

5-15A

On the original Star Trek series, what were the call letters of the Star Ship Enterprise?

NCC-1701

5-20Name the encore song Marty McFly played at the school dance that was rumored to have inspired Chuck Berry’s ‘new’ Rock & Roll song.

5-20A

Johnny B. Goode!

5-25

What actor has played both a Vulcan, and a psychopathic killer

with mutant powers?

5-25A

Zachary Quinto

What actor has played both a Vulcan, and a psychopathic killer

with mutant powers?

In ‘Heroes’as Sylar

Daily Double

If an object is launched 24 m/s at an angle of 30o, how much time will it take before it reaches the top?