Forces introduction investigation KS3

A series of small practical and thinking activities to introduce students to the idea of forces. Includes measuring using Newton meters, seeing what happens to an object when a constant force acts on it, and thinking about types and effects of force. Needs to be followed up by class discussion or teacher presentation on the outcomes of the activities, and on force effects and types. I have also used this with KS4 students to recap forces (though with the expectation that they will be quicker and more independent).