17.32. Set Up:A proton has charge and mass Solve: (a)The gravity force is downward so the electrical force must be upward. An upward force from a downwardelectric field requires a negative charge. The charge is (b)17.33. Set Up:Use the coordinates shown in Figure 17.33. Since the electric field is uniform, the force is constantand the acceleration is constant. and For an electron,andFigure 17.33Solve: (a)and (b)Reflect:We could also use the work-energy theorem and set the work done by the force equal to the gain in kineticenergy of the electron.17.34. Set Up:For a point charge,is toward a negative charge and away from a positive charge.Solve: (a)The field is toward the negative charge so is downward.(b)17.35. Set Up:For a point charge,Solve:0q05Er2k516.503103N/C210.100 m228.993109N#m2/C257.2331029CE5k0q0r2.r5Åk0q0E5Å18.993109N#m2/C23.0031029C212.0 N/C51.50 mE518.993109N#m2/C223.0031029C10.250 m225432 N/C.ESE5k0q0r2.vy5v0y1ayt50112.8431014m
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 03/06/2009 for the course PHYS 114 taught by Professor Shoberg during the Spring '07 term at Pittsburg State Uiversity.