Experiment with how much more energy is needed to catapult a heavier object the same distance as a lighter object.What types of metal conduct heat the fastest? Do some conduct heat more evenly than others? What types of materials are good insulators?.What type of pulley provides the highest mechanical advantage for a particular job?.What are the resulting velocities after a moving and unmoving object collide? What about two moving objects in same or different directions? Use toy cars or a dynamic cart to test what impact increased mass has on velocity.Older kids can use a spring scale to measure the force of friction. What type of flooring (carpet, wood, tile, linoleum, etc.) creates the most or the least friction? (Younger kids might test this by rolling a ball or toy truck over different surfaces.How do different brands of plastic wrap compare when stretched with equal force? How do different brands of duct or clear tape compare in strength and stickiness? Can you identify what factors cause one to perform better than another?.
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