An electron moves with a constant horizontal velocity of 3.0 × 10⁶ m/s,and no initial vertical velocity as it enters a deflector inside a TV tube.The electron strikes the screen after traveling 17.0 cm.horizontally and 40.0 cm vertically upward with no horizontal acceleration.What is the constant vertical acceleration provided by the deflector? (The effects of gravity can be ignored.) A) 2.5 × 10¹⁴ m/s² B) 8.3 × 10² m/s² C) 1.4 × 10⁴ m/s² D) 1.2 × 10¹⁴ m/s²

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Quizplus · Accepted Answer

The correct answer is A.The electron's vertical acceleration is constant, so we can use the following equation:v^2 = u^2 + 2aswhere:v is the final vertical velocity (40.0 cm/s)u is the initial vertical velocity (0 cm/s)a is the vertical acceleration (unknown)s is the vertical displacement (17.0 cm)Substituting the given values into the equation, we get:(40.0 cm/s)^2 = (0 cm/s)^2 + 2a(17.0 cm)Solving for a, we get:a = 2.5 × 10^14 m/s^2

An Electron Moves with a Constant Horizontal Velocity of 3