A positron (charge + e, mass equal to the electron mass) is moving at 1.0 x 107 m/s in the positive direction of an x axis when, at x = 0, it encounters an electric field directed along the x axis. The electric potential V associated with the field is given in Figure. The scale of the vertical axis is set by Vs = 500.0 V.

(a) Does the positron emerge from the field at x = 0 (which means its motion is reversed) or at x = 0.50 m (which means its motion is not reversed)?

(b) What is its speed when it emerges?

Transcribed Image Text:

V (V) x (cm) 20 50