Forces - Answers

In a set of answers for Year Three science homework on forces, students are required to demonstrate their understanding of basic physical concepts. The first task involves identifying whether a scenario depicts a push or a pull, with students drawing lines to indicate their answers. Following this, they are asked to illustrate the direction of force in a tug-of-war scenario by drawing arrows. The concept of forces causing acceleration or deceleration is explored through a series of statements where students must tick the appropriate box to indicate which is occurring in each situation, such as throwing a ball or pressing a car's brake pedal.

Students are also quizzed on the force that occurs when two objects rub together, which is identified as friction, and they must note that this force typically slows objects down. In a practical application of this concept, they examine data from a tyre manufacturer's test on stopping distances with different tyre treads. From the results, students deduce that tyres with no tread provide the least friction and that high tread tyres are preferable in rainy conditions, as rain reduces the friction between the tyre and the road. Additional questions cover magnetic forces, where students distinguish between attraction and repulsion in magnets, identify different types of magnets such as bar and horseshoe magnets, and evaluate their strength based on their ability to attract paper clips from varying distances. The homework concludes with students categorising materials based on whether they are attracted to a magnet, reinforcing their knowledge of magnetic properties in various substances.