# physics

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A 5.2 kg box is on a frictionless 36 degree slope and is connected via a mass less string over a mass less, frictionless pulley to a hanging 2.1 kg weight.

What is the tension in the string if the 5.2 kg box is held in place, so that it cannot move?

• physics -

If the 5.2 kg box is not moving, neither is the 2.1 kg weight.

The weight's weight of 2.1 * 9.8 = 20.6 N is balanced by the string tension.

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