Find the magnitude and direction of the electric field at the point (2,5). 7. A muon is decelerated by an electric field of 2.2 x 103 N/C to rest over a distance of 4.20cm. (a) Find the particle's initial velocity and kinetic energy. (b) Perform the same calculations in (a) for a tau particle A 1 kg mass is connected to a spring and oscillates back and forth. The largest velocity that the mass has while it is oscillating is 2 m/s. If the spring constant of the system is k = 4 Newton/meter, what is the amplitude of the oscillations?