Determine a measurement that might be more useful than measuring the movement of an individual charge

Need in all of themmm only answer if you know plsssss

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j