A Maglev train is powered by magnetism and electricity. A student wants to build a model of this train. Which test will best determine if the model train works?
Attach the train to an electric fan
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Connect the train to a solar panel
Connect the train to an electromagnet
Connect the train to a rocket
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Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?