Science Starters Sheet 4 When you are done read your AR book 1 Please have these Items on your desk Agenda 2 Fill out your Agenda Science Starter What does Newtons first law state Give an ID: 619156
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Tuesday, 3/3/14 Day 2
ScienceStartersSheet
4- When you are done, read your AR book.
1. Please have theseItems on your desk.
Agenda
2- Fill out your Agenda.
Science Starter: What does Newton’s first law state? Give an example.
AR
BookSlide2
T.O.C- Update
Pages 35/36 3/4 How to Calculate Net ForceSlide3
How To Calculate Net ForceSlide4
What is a force?
Force is a push or pull in a particular direction.Slide5
Forces
can affect motion in several ways: They can: make objects start movingMove objects faster or slower
Stop objects change directionSlide6
FORCE FACTS:
Measured in Newton's (N)Forces usually act in pairs
Forces act in a particular direction Usually cannot be seen Slide7
How to Calculate Net Forces
When two forces act in the same direction on an object, the net force is equal to the sum of the two forces
8N
6N
14NSlide8
How to Calculate Net Forces Continued
When two unequal forces act in opposite directions on an object, the net force is the difference of the two forces
18N
5
0N32N
LeftSlide9
Force, Mass, Acceleration
Force = Mass x AccelerationF= maHow much force is required to accelerate a 50 kg mass at 4 m/s2?
F=M=
A=50 kg
4 m/s?
F=50 kg4 m/s*F=
200NFm aSlide10
What is the acceleration of a 7 kg mass being pulled by a 56 N force?
F=
M=A=7 kg
56N?
F=ma56N
=7 kg*?8 m/sSlide11
What is the mass of a block accelerating at 2 m/s2 and pushed by a 9 N force?
F=M=A =
9N2 m/s
?F=ma
9N=?*2 m/s4.5 kgSlide12