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Transcript of Force
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M. EVAN CENDEKIA S.VIII A021
M. Evan Cendekia s
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Force Newton’s Laws
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A force is a push or pull upon an object resulting from the object's interaction with another object
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There are two part of force 1. contact force 2. non contact force
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Contact Force
1. frictional force 2. machine force 3. muscular force 4. spring force 5. air resistance force 6. electrical force
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Non contact force
1. gravitation force 2. magnetic force
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1. Frictional Force Spring force is a force that produce from a spring, because the spring is pulled or pressed
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2. Machine Force Machine force is the force generated by a given the machine.
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3. Muscular Force
Muscular force is a force that comes from muscular power.
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4. Spring ForceSpring force is a force that produce from a spring, because the spring is pulled or pressed
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5. Air Resistance Force
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Electrical Force
Electric force is a force produced by electrical charges.
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Gravitation ForceGravitation force is the attraction force caused by the earth.
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Magnetic ForceMagnetic force is a force produced by magnets.
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Beneficial
1. Frictional Force : car can move 2. Machine Force : can produce electrical
( Diesel Engine) 3. Muscular Force : People can push the car 4. Spring Force : People can hunt with spring
force ( use arrow ) Air resistance Force : wind can play windmill that
can regenerate energy 5. Electrical force : the lamp will be light 6. Gravitational Force : reflected basketball will
not bounce too high so basketball players no trouble catching the ball
7. magnetic force : can collect nails in the street
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Harmful
1. Frictional Force : friction car with other cars
2. Machine Force : machines produce waste 3. Muscular Force : fight causes pain in the
body 4. Spring Force : people use arrow to kill
rare animal Air resistance Force : can make a tornado 5. Electrical force : can kill people 6. Gravitational Force : meteor that across the
atmosphere will pulled into earth by gravitation 7. magnetic force : tv will be chance color
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Resultan force
Several force acting on the body in one work line can be replaced by a force called force resultant
Mathematically, the magnitude of force resultant (R) is expressed as follows :
321 FFFR
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WEIGHT(berat)
Weight of a body can change depends on the magnitude of gravitational force.
Weight of the body is earth gravitational force acting on the body.
Weight of a body can change depends on the magnitude of gravitational force.
The weight unit is states with force unit, namely newton (N)
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Newton’s I law
“every body will be at rest or move in uniform rectilinear if there is no forces change that condition.”
“ if force resultant acting on the body is equal to zero, or there is no forces acting on the body, the body will be at rest ( does not move ) or will move in uniform rectilinear”
0F
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Newton’s II Law
“The body that influence force will have acceleration which its magnitude is directly proportional to the magnitude of the sum of force and inversely proportional to its mass”
amFm
Fa ./
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Newton’s III law
“If a body makes force ( making action ) to another body, apears reaction force from the body to the former body with equal magnitudes, while the directions are in opposite”
21/ FFFF reaksiaksi
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Thank you
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MADE BY: M. Evan Cendekia s.