15. 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
M. Evan Cendekia s
16. 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
M. Evan Cendekia s
17. 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 :
R F1 F2 F3
M. Evan Cendekia s
18. 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)
M. Evan Cendekia s
19. “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”
F 0
M. Evan Cendekia s
20. “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”
F
a /F m.a
m
M. Evan Cendekia s
21. “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”
Faksi Freaksi / F1 F2
M. Evan Cendekia s