A group of science and engineering students embarks on a quest to make an electr

Question

A group of science and engineering students embarks on a quest to make an electrostatic projectile launcher. For their first trial, a horizontal, frictionless surface is positioned next to the 12-cm-diameter sphere of a Van de Graaff generator, and a small, 4.0 g plastic cube is placed on the surface with its center 2.0 cm from the edge of the sphere. The cube is given a positive charge, and then the Van de Graaff generator is turned on, charging the sphere to a potential of 200,000 V in a negligible amount of time.

Part A

How much charge does the plastic cube need to achieve a final speed of a mere 3.0 m/s?

Express your answer with the appropriate units.

Part B Does this seem like a practical projectile launcher? Match the words in the left column to the appropriate blank in the sentences on the right. Make certain each sentence is complete before submitting your answer. eset Help smaller While the charge on the cube might be 3.0 m/s is not a very projectile speed, and the charge greater would have to be to have a slow faster projectile speed, so this unreasonable practical projectile launcher is not fast reasonable Submit My Answers Give Up

Explanation / Answer

let charge is q

qV=0.5mv^2

we know everything except q

solving for q

we got

q=9*10^(-8) coulomb

(2) Accumulating so much of charge is not difficult nut speed is very slow ,so this is not a good/practile projectile

fill in the blanks

(1)reasonable

(2)fast

(3)greater

(4)is not

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