ch22_p85 - 85. (a) Since E points down and we need an...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
85. (a) Since G E points down and we need an upward electric force (to cancel the downward pull of gravity), then we require the charge of the sphere to be negative. The magnitude of the charge is found by working with the absolute value of Eq. 22-28: 4.4N | | 0.029C 150 N C Fm g q EE == = = , or 0.029 C. q =− (b) The feasibility of this experiment may be studied by using Eq. 22-3 (using k for 1/4
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online