Question

what force could you put on a 2-kg see-saw to cause a torque of 200 N-m when applied straight down. 2 meters away from the center fulcrum?

Answer 1

The force that will cause the given torque on the see-saw is 100 N.

The given parameters:

• Mass of the see-saw, m = 2 kg
• Torque applied, τ = 200 N-m
• Radius of the fulcrum, r = 2 m

The force that will cause the given torque on the see-saw is calculated as follows;

τ = Fr

$F = \frac{\tau}{r} \\\\F = \frac{200}{2} \\\\F = 100 \ N$

Thus, the force that will cause the given torque on the see-saw is 100 N.

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