A 10 m beam of mass 330 kg extends over a ledge. the beam, Ask an Expert

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Q. A 10 m beam of mass 330 kg extends over a ledge. The beam is not attached, but simply rests on the surface. A 53 kg student intends to position the beam so that he can walk to the end of it. How far from the edge of the ledge can the beam extend?

Q. Three resistors, 12.9 ohm, 52.7 ohm, and R, are connected in series with a 12.0 V battery. The total current flowing through the battery is 0.153 A. Calculate the value of resistance R.

Calculate the potential difference across the 12.9 ohm resistor.

Calculate the potential difference across the 52.7 ohm resistor.

Calculate the potential difference across R.

If the voltage of the battery had been smaller than 12.0 V, would the value of resistance$R have been larger or smaller?

The value of resistance R would have been larger.

The value of resistance R would have been smaller.

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