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FORCES
FORCES
 Forces are actions which make objects
NASA's KSNN™
MOVE
STOP
CHANGE SHAPE
TYPES OF FORCES
 GRAVITY: This force makes objects fall to the ground.
If we throw an object into the
air, gravity pulls it to the ground
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NASA's KSNN™ K2 Newsbreaks
 ELECTRIC FORCE: This force is found between
electrically charged objects.
Electric force can
attract or repel.
 MAGNETIC FORCE: This force affects magnets and
some metallic objects.
Magnetic force can
attract or repel.
NASA's KSNN™ K2 Newsbreaks
 FRICTION: When an object touches another object it
experiences a frictional force.
This force acts in the direction
opposite to the direction of the
movement.
GLOSSARY
 Write down on your notebooks the definition of:
 Force: Actions which make objets move, stop and change shape.
 Magnetic force: Force which affects magnets and some metallic
objets. It can attract or repel.
 Gravity: Force that makes objects fall to the ground.
 Friction: When an object touches another object, it experiences a
frictional force in the opposite direction of the movement.
ACTIVITIES
 Tell me what forces are acting in this cases
 1. We throw a ball in the air, and it comes down again.
 2. We kick a ball in the ground but it stops after 20 meters.
 3. When we turn on the lights.
 4. When we use a washing machine.
 5. When we put a decorative piece on the fridge.