A fisherman in Barbados uses a fishing rod that acts as a lever. He holds the rod 0.4 m from the pivot point and a fish exerts a downward force of 50 N at 2.0 m from the pivot. Which statement correctly describes the moments?

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Question

A fisherman in Barbados uses a fishing rod that acts as a lever. He holds the rod 0.4 m from the pivot point and a fish exerts a downward force of 50 N at 2.0 m from the pivot. Which statement correctly describes the moments?

Accepted Answer

The fish creates an anticlockwise moment of 100 N m — Award 1 mark for recognizing moment = 50 N × 2.0 m = 100 N m in the anticlockwise direction (assuming standard setup). D is incorrect — direction error, fish pulling down creates anticlockwise moment. B is incorrect — force needed depends on distance: 100/0.4 = 250 N. C is incorrect — confuses distance with moment.

Answer

The fisherman must apply a force of 50 N to balance the fish

Answer

The total moment about the pivot is 2.4 N m

Answer

The fish creates an anticlockwise moment of 100 N m

Answer

The fish creates a clockwise moment of 100 N m

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