Question

(e) A 35-kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 210 J from 440 J. How high does she rise during this interval? Neglect air resistance. (f) Four identical metallic objects carry the following charges: +1.6, +6.2, -4.8, and -9.4 uC. The objects are brought simultaneously into contact, so that each touches the others and then separated. How many excess electrons make up the final charge on each object? (g) Two point charges, + 34 pC and-61 μC, are separated by 1.20 m, what is the electric potential midway between them? uC of charge on its plates when a voltage of 1.5 V is applied between them?

Answer 1