P 1.1
Spiderman The movie Spiderman brought in $114,000,000 in its opening weekend.
A - Express this amount in gigadollars.
B - Express this amount in teradollars.
P 1.4
IBM has a computer it calls the Blue Gene/L that can do 136.8 teracalculations per
se
P9.1 A 18.0-g marble is dropped from rest onto the floor 1.65 mm below. If the marble bounces straight upward to
a height of 0.530 mm, what is the magnitude of the impulse delivered to the marble by the floor?
P9.2 An object has a kinetic energy of 290 J
CHAPTER 7': ENERGYAHD ENERGY TRANSFER
WDRK:
- The prueess ef'ehanging energy ef'a syslern
- The prneess enf' transferring energy
* Energy transferred inte a system, Qesitiye wart:
- Energy transferred nut Ltf a systelri1 negative werte
I If the kinetic
Friction Forces: (f or Ff)
Friction arises between objects in contact with each other
Friction opposes motion between the objects
The magnitude of the friction force depends on the coefficient of friction
(which depends on the materials rubbing against
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A. - Hew mueh 1a'erl: tie yeti tie en the ear: erl'psint?
E - Ten held the ean statienas}r fer half a minute: waiting fer a friend an a ladder ta take it- Hes;
miteh we
CHAPTER 5: NEWTONS LAWS OF MOTION
Force: push or pull
Vector
Causes acceleration in direction of force
Add as vectors
NET FORCE: Vector sum of all forces
CONTACT FORCE: Force exerted by physically touching
FIELD FORCE: Forces exerted without touching b
CHAPTER 5: NEWTONS LAWS OF MOTION
Force: push or pull
Vector
Causes acceleration in direction of force
Add as vectors
NET FORCE: Vector sum of all forces
CONTACT FORCE: Force exerted by physically touching
FIELD FORCE: Forces exerted without touching b
CHAPTER 4: MOTION IN TWO DIMENSIONS
All of our equations of motion in 1 dimension can be applied to
2 dimensions (or 3!)
Multiple dimension vectors can be broken down into x, y, and z
components
Most importantly, force, acceleration, motion, field, etc.
c
P4.5
A particle passes through the origin with a velocity of 6.4 m/s y.
A - If the particle's acceleration is -4.2 m/s
6.0s ?
2
x, what are its x and y positions after
B - What are vx and vy after 6.0 s?
C - Does the speed of this particle increase with t
KINEMATICS IN 1 DIMENSION
Position - Location in space
x in 1 dimension
Displacement - change in position: xf - xi
x in 1 dimension
Displacement Distance
Displacement is a vector it has magnitude
and direction
distance = displacement = +3m
x=+2m
x=+1m
P3.21 An air traffic controller observes two airplanes approaching the airport. The
displacement from the control tower to plane 1 is given by the vector A, which has a
magnitude of 220 km and points in a direction 32 north of west. The displacement
from
Equations of Motion for CONSTANT ACCELERATION:
v f vi
v
a=
=
(ASSUMING STARTING AT t = 0)
t
t
EXAMPLE 1: A race cars velocity increases from +4 m/s to
+36 m/s over a 4.0 s interval. What is the average acceleration?
EXAMPLE 2: Now the cars velocity decrea
FREEFALL:
FREE FALLING OBJECTS (ON EARTH) EXPERIENCE A
CONSTANT ACCELERATION DUE TO GRAVITY:
ACCELERATION OF GRAVITY: g = -9.81 m/s2
ACCELERATION IS DOWNWARD, NO MATTER WHAT
DIRECTION OBJECT IS MOVING
EXAMPLE 1: A rock is dropped (vi = 0.0 m/s) from a bri
2.18 You jog at 9.5 km/h for 8.0 km , then you jump into a car and drive an additional
17 km . With what average speed must you drive your car if your average speed for the
entire 25 km is to be 22 km/h ?
2.32 A 747 airliner reaches its takeoff speed of 1
Example 1: Find the momentum of a 25.3 kg mass,
moving to the right at 3.46 m/s.
EXAMPLE 2: A BAT EXERTS A 450. N
FORCE ON A 3.00 kg BALL FOR .150 s. THE
BALL IS MOVING HORIZONTALLY TO THE
LEFT AT 12.0 m/s. ASSUMING IT IS HIT
HORIZONTALLY BY THE BAT, WHAT