Download Motion: Forces and Cases of Motion

Motion: Forces and Cases of Motion
Name______________ assign#_____
2.
3.
1. .
A _______ or ____________ that one body ______________ on another.
FORCE
Forces can be: ______________________________
Which means ________ acceleration and _______ change of motion.
5.
Forces can be: ______________________________
Which means that there is a ____________ force. The object will either
____________ up, __________ down or __________________ direction.
6. Which way will the object move?
____________________
7.
8.
10.
The unit of FORCE is the ______________.
Newton’s 1st
Law of
Motion.
Objects keep on doing what
____________ _______.
An object at _____________ stays at rest, and an
object in motion stays in __________ unless acted upon
by a __________ external force.
Also called the Law of
___________
11.
1N=
________ of the
forces
Tendency of an object to _____________
any ____________ in its motion
The acceleration of an object is __________________
proportional to the net external ___________ acting on
the object and _______________proportional to the
object’s __________________.
14.
Newton’s 2nd
Law of
Motion.
17. Newton’s 2nd Law Example Problem:
What force is needed to give an object with a mass of 25.0 kg an acceleration of 15.0 m/s2 ?
18. Forces that oppose motion
19. _____________is a force that opposes motion between _______ __________
that are touching each other. _____________ resistance is the force air exerts on
a moving object.
20.
Caused by
Microscopic, electrostatic
interactions between
__________ _________
FRICTION
3
2
1
21. & 23
force required to overcome inertia of
a_________________ object
force required
to keep an
object
___________
at a constant
speed
force required to keep an object
______________at a constant speed
24. The amount of force required to overcome ___________________ friction is always
greater than the force required to overcome _______________ or ____________
friction.
Motion: Forces and Cases of Motion
Name______________ assign#_____
2. .
A _______ or ____________ that one body ______________ on another.
is an ___________ force
25.
GRAVITY
the amount of which depends on
*All objects ____________toward the earth at the __________ ___________ of
acceleration, regardless of their masses
27. From the video Clip:
Who explained gravity? ______________________________________
Gravitation is a ______________ ______________.
What are two examples? ____________________________________
Why doesn’t the moon fall to Earth?___________________________
_______________________________________________________
29. Freefall and Terminal Velocity:
Objects accelerate towards the ______________until the force of gravity is
cancelled or ______________ by this air resistance. This is the
________________ ____________________ an object can reach.
30.
WEIGHT
Force of _________
on an object
Formula:
33. Work the example problem:
What is your weight if your mass 4.52 kilograms?
Measured in
____________
34.
Newton’s 3rd
Law of
Motion.
…to every __________ force there
is an __________ and opposite
reaction force
Examples:
37
Projectile
Motion
Projectiles follow a
__________ path
because of the ___________
___________ pull.
________________ Motion
________________ Motion
38. Which will hit the ground first? A ball that is dropped straight down or a ball that is
“shot” out horizontally? _____________________________________________
41 Circular Motion: Centripetal force is the force that causes a moving object to move in
a __________________ ____________________.
43. From the video:
What forces are involved in roller coasters? (name 3) _____________________
_____________________________________________________________
What happens at 6 g-force? ________________________________________
_____________________________________________________________
At what g-force is the roller coaster running? __________________________
_____________________________________________________________