14.4.11 Evaluate the solution The problem: A 2.0-kg cart with a +2.0 × 1.0 m fro

Question

14.4.11 Evaluate the solution The problem: A 2.0-kg cart with a +2.0 × 1.0 m from a fixed dome with charge +1.0 × 10-4 C. The cart is released. Determine how fast it is moving when it is 3.0 m from the fixed-charged dome. Proposed solution: Sketch and translate 41 1.0 x 104C 10-5 C charge on it starts at rest 92 20 x 10c =? 1.0 m 3.0 m The situation is depicted in the illustration to the right. Simplify and diagram We assume that the dome and cart are point particles See the bar chart to the right. GE FOEGE AND ENERGY 14-15

Explanation / Answer

Considering formulas and method, everything is fine in its place, except calculation.

Velocity, v = (18)1/2 = 4.24 m/s (Right answer)

Error: Square root wasn't taken, while solving final value 18, so you need to take square root of 18 to get final velocity.

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