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First: an object remains at rest or constant speed unless acted on by an external force

Second: Force is equal to rate of change of momentum

Third: Every action has an equal and opposite rea...

When coherent, in-phase light passes through two slits they act as seperate sources, these waves diffract and overlap, causing regions of constructive and destructive interference. When they collide with ...

The key fact here is in free fall everything accelerates at the same rate. Acceleration is equal to 9.81 m/s² (accleration of free fall). This means provided you drop both at the same height, a...

First we differentiate the substitution giving, du/dx=-sinx, which is rearanged to dx=du/-sinx. we can then substitute this into the integral to get sinx e^cosx+1 du/-sinx which can be simplified to -e^co...

This depends on the path of the object and what information you have.
You could be looking at conservation of kinetic and gravitational potential energy. Total energy must be the same at all times. ...