5. IS A PUSH OR PULL OR BOTH
A force to move an object
away from our bodies
A pull is when we apply a
force to move an object
towards our body
PUSH PULL
Launching
Rocket
Pulling
a box
6. COMBINATION OF PUSH AND PULL
Playing a guitar
Sawing wood Scrubbing the
floor
Rowing a boat
7. EFECT OF
FORCE
CHANGES THE SHAPE
TEMPORARILY
CHANGES THE SHAPE
PERMANENTLY
CHANGES THE DIRECTION
OF A MOVING OBJECT
CHANGES THE SPEED OF
A MOVING OBJECT
STOPS A MOVING OBJECT
OR MAKES A STATIONARY OBJECT
MOVES
8.
9. CHILDREN’S MISCONCEPTION
A SOLID CANNOT BE COMPRESSED OR STRETCHED
EXPLANATION
THE SHAPE OFA SOLID OBJECT CHANGES WHEN A FORCE IS
APPLIED TO IT WHETHER IT’S TEMPORARIRLY OR
PERMANENTLY
EXAMPLE : CRUSHING A CAN
(CHANGES THE SHAPE
PERMANENTLY)
10. WHEN A FORCE IS APPLIED
IN AN OPPOSITE
DIRECTION (DIFFERENT
DIRECTION) THE APPLYING
OBJECT WILL CHANGE
THE MOVING DIRECTION
11. A STATIONARY BALL WILL MOVE
WHEN IT IS KICKED
THE MOVING BALL WILL STOP
WHEN AN EQUAL FORCE IS APPLIED
IN THE OPPOSITE DIRECTION OF
ITS MOTION
MOVES IN THE SAME DIRECTION
AS IS THE APPLIED FORCE
12. FORCE IS A PROPERTY OF AN OBJECT. AN OBJECT HAS FORCE WHEN
IT RUNS OUT OF FORCE IT STOPS MOVING
EXPLANATION
AN OBJECT AT REST OR IN
MOTION WILL REMAIN IN
THAT STATE
UNLESS AN EXTERNAL FORCE
IS APPLIED TO THE OBJECT
NEWTON 1ST LAW
13. OCCURES WHEN TWO SURFACES ARE MOVING
IN CONTACT WITH EACH OTHER
FACTORS THAT EFFECT FRICTION:
Physical condition of the surface
Weight of an object
WAYS TO REDUCE:
Use ball bearing Use wheel and axle
14. A D VA N TA G E S :
Enables people to run and
work without falling or
slipping
Enables us to write on
paper
Enables a car to stop when
the brakes are applied
D I S A D VA N TA G E S :
Slow down a moving
object
Causes the surfaces of
objects to wear out
Causes less effectiveness
of moving machine
