Can anyone give me a hand with these questions?
56. A proton is released from rest in a uniform electric field of
magnitude 1.08 x 10^5 N/C. Find the speed of the proton after it has
traveled (a) 1.00 cm and (b) 10.0 cm.
58. A point charge at the origin of a coordinate system produces the
electric field E=(36,000 N/C)x on the x-axis at the location x=-0.50
m. Determine the sign and magnitude of the charge.
I don't get the second one AT ALL.
These are problems 56 and 58 on page 643 of the textbook PHYSICS
Second Edition JAMES S. WALKER, published by PEARSON/ Prentice Hall.
