Reason For Learning
Forces act on you all the time. If you surf, you can feel many forces pushing and pulling you in different directions. Gravity always pulls you down, towards the centre of the Earth. This force can be balanced by the support of the surfboard acting upwards. Forces of the waves push you towards shore, and friction from the air and water pull you back out to sea. Surfing requires your body to balance all those forces acting on you. If they're not balanced, then down you go!
Learning Intention
(1) Identify whether forces acting upon an object are balanced or unbalanced. (2) Recall that change to an object's motion is caused by unbalanced forces acting on the object. (3) How can we represent forces in a diagram?
Key Vocabulary Terms