Hammering nails 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Further Resources This task is about forces and energy. Question 1Change answer While putting together a tree hut a group of children used a hammer to nail boards to a wooden frame. One board was of a very dense wood and the nails would not go through it. Jeremy went to his house and got a larger, heavier hammer and used that. This time the nails went through the board after a few hits. a) Using the word 'force', explain why the heavier, larger hammer could drive the nails into the dense wood whereas the smaller, lighter hammer had not been able to. While putting together a tree hut a group of children used a hammer to nail boards to a wooden frame. One board was of a very dense wood and the nails would not go through it. Jeremy went to his house and got a larger, heavier hammer and used that. This time the nails went through the board after a few hits. a) Using the word 'force', explain why the heavier, larger hammer could drive the nails into the dense wood whereas the smaller, lighter hammer had not been able to. Question 1Change answer b) What does the word 'dense' mean as used to describe the wood? b) What does the word 'dense' mean as used to describe the wood? Task administration: This task can be completed with pencil and paper or online. Level: 5 Curriculum info: Science, Knowledge, Physical World Keywords: physics concepts, forces, density, mass Description of task: Students use the term force to explain why a heavier hammer could drive nails into denser material and explain density. Curriculum Links: Science capabilities The capabilities focus is brought about by the conversations you have and the questions you ask. Capability: Gather and interpret data This resource provides opportunities to discuss how our science understandings help us explain what we observe. Science capability: Gather and interpret data (TKI) Answers/responses: Y10 (03/1998) a) The larger hammer allows a greater force to be applied (with the same acceleration). very easy b) Denser material has more mass in the same volume/particles are closer together. (A mathematical equation is an acceptable response, i.e., d = m/V) difficult Balancing the see-saw Magnetism Pulling out nails Wheelbarrows Spring stretch Lifting water bottles Magnetic fields Pruning trees Bike race Access ramps Bounce height Types of energy The water cooler Seesaw Rowing Lifting rocks Stopping distances of toy cars Levers Pulley systems Springs II Balancing see-saws Springs What helps a racing car go fast? Bendy ruler Ideas about forces and energy Rolling cars "I know something about forces." Self-regulated learning during science investigations in a junior classroom
