A charge of q = 7 C is in a uniform electric field of E = 6 N/C which points in positive direction along the x-axis. The charge is located at x = 0 cm on the x-axis. Draw a free body diagram of the charge in the electric field, with the charge labeled with its magnitude, with the electric field drawn and labeled with its magnitude, and with a vector (arrow) representing the force on the charge. What is the magnitude and direction of the force on the charge q when it is at x = 0 cm? What is the magnitude and direction of the force on the charge q when it is at x = 10 cm? Could you and a friend hold this charge in place? Why or why not? (Convert your answer for force from units of Newtons into pounds-force to get an idea of how strong this force is.) If q is moved from x = 30 cm to x = 10 cm, what is the change in the potential energy (in Joules) of q? If q is removed from the system, what is the change in electric potential from x = 30 cm to x = 10 cm? Circle the correct word in parentheses: The potential energy of q is increased as it is moved in the (positive, negative) direction along the x-axis.

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Chapter1: Units, Trigonometry. And Vectors
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  1. A charge of q = 7 C is in a uniform electric field of E = 6 N/C which points in positive direction along the x-axis. The charge is located at x = 0 cm on the x-axis.
    1. Draw a free body diagram of the charge in the electric field, with the charge labeled with its magnitude, with the electric field drawn and labeled with its magnitude, and with a vector (arrow) representing the force on the charge.
    2. What is the magnitude and direction of the force on the charge q when it is at x = 0 cm?
    3. What is the magnitude and direction of the force on the charge q when it is at x = 10 cm?
    4. Could you and a friend hold this charge in place? Why or why not? (Convert your answer for force from units of Newtons into pounds-force to get an idea of how strong this force is.)
    5. If q is moved from x = 30 cm to x = 10 cm, what is the change in the potential energy (in Joules) of q?
    6. If q is removed from the system, what is the change in electric potential from x = 30 cm to x = 10 cm?
    7. Circle the correct word in parentheses: The potential energy of q is increased as it is moved in the (positive, negative) direction along the x-axis.
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