A spring has a spring constant, (k), of 3 N/m. It is stretched until it is extended by 50 cm. Calculate the elastic potential energy stored by the spring, assuming it is not stretched beyond the ...

A physics video claims rubber bands don't act like springs. But is that true? Dot Physics blogger Rhett Allain tests the notion with a few custom contraptions.

Learn about the work done and conservation of energy, the relationship between force and extension on a spring, and energy efficiency of vehicles.