WATCH THE VIDEO TO LEARN MORE ABOUT THE 4 TYPES OF FORCES: GRAVITATIONAL FORCE, FRICTIONAL FORCE, MAGNETIC FORCE AND ELASTIC SPRING FORCE!

 

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TAKE THIS QUIZ TO PRACTICE WHAT YOU HAVE LEARNT.

SCORE AS WELL AS YOU CAN TO GET CLOSER TO THE MOON!


RECAP THE CONCEPTS

  • A force is a push or a pull.

  • A force can cause things to change its speed, direction, shape or size.


Gravitational force

  • Gravity is the force of attraction between objects.

  • Gravity depends on the mass of the objects and the distance between them.

  • Earth's gravitational force acts on all objects that are near it all the time, even when they are not moving.


Frictional force

  • Friction is a force that opposes motion.

  • Friction produces heat energy.

  • Friction can be useful (provides a grip to prevent slipping).

  • Friction can also be a problem as it causes moving parts to wear out or overheat.


Elastic spring force

  • Elastic spring force occurs when an elastic object is stretched, bent, twisted or compressed.

  • When a load is hung onto a spring, the spring stretches. Extension = New length - Original length.

  • The larger the load hanging on a spring, the greater the extension of the spring.

  • The load and extension are proportional up till a certain point.