Recent content by belledona

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    Reviewing Kinematics for AP Physics Exams: When to Subtract Gravity?

    So the thrust will be F=5*mass of the rocket?
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    Reviewing Kinematics for AP Physics Exams: When to Subtract Gravity?

    Oh, so the net acceleration is 5 m/s^2? (As in, the rocket has already overpowered gravity, so 9.8 does not need to be subtracted from 5?)
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    Reviewing Kinematics for AP Physics Exams: When to Subtract Gravity?

    Hello, I'm reviewing kinematics for an upcoming AP physics exam, but I seem to have forgotten a crucial fact. In typical rocket problems (when the rocket blasts off with an initial acceleration for example 5 m/s^2), why don't we subtract 9.8 from 5m/s^2 when using a value for acceleration? When...
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    Does U=qV or -qV? I notice my textbook uses qV but

    hi, thanks for your answer! so U=qV would only be negative if F=qE --> q=F/E (force is negative) here?
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    Does U=qV or -qV? I notice my textbook uses qV but

    Hi I have a question about electric potential! Since the negative sign isn't used in U=qV, and a-b is used for subscripts, then that takes care of the negative. But what about using U=-qV? An online lecturer uses U=-qV, while my textbook uses U=qV and then uses -qV to explain the force used to...