Note: Torques that would cause a clockwise rotation are considered negative and

Question

Note: Torques that would cause a clockwise rotation are considered negative and torques that would cause a counter-clockwise rotation are considered positive.) A see-saw at a city park is like a giant lever. What is the torque that a 37 kg child produces when is sitting 3.0 m to the right of the fulcrum (pivot point)?

(Note: Torques that would cause a clockwise rotation are considered negative and torques that would cause a counter-clockwise rotation are considered positive.)

A see-saw a city park is like a giant lever.

What is the torque that a 48 kg child produces when is sitting 2.7 to the left of the fulcrum (pivot point)?

Explanation / Answer

a) Child sitting on right side of the fulcrum produces clockwise torque. Hence the torque is negative.

Torque T = r X mg = 3m X 37 kg X 10 m/s^2 = -1110 N

b) Child sitting on left hand side of the fulcrum produces counter clock wise torque. Hence the troque is posiitve.

Torque T = r x mg = 2.7 m X 48 kg X 10 m/s^2 = + 1296 N

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