Question

A diving board length L = 5.40 m that weighs 220 N is supported by two pillars. One pillar is at the left end of the diving board, as shown below; the other is distance d = 1.60 m away

1. Find the magnitude of the force exerted by the left pillar when a 90.0 kg diver stands at the far end of the board.

2. Find the direction of the force exerted by the right pillar when a 90.0 kg diver stands at the far end of the board. (upward or downward??)

3. Find the magnitude of the force exerted by the right pillar when a 90.0 kg diver stands at the far end of the board.

Answer 1

1. Find the magnitude of the force exerted by the left pillar when a 90.0 kg diver stands at the far end of the board.

Take moment about the right pillar

ANSWER :

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3. Find the magnitude of the force exerted by the right pillar when a 90.0 kg diver stands at the far end of the board.

Let's assume Force is acting upwards

Consider all vertical forces

ANSWER :

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2. Find the direction of the force exerted by the right pillar when a 90.0 kg diver stands at the far end of the board. (upward or downward??)

Since answer from question 3 is positive, the assumption is right

ANSWER : is acting upwards.

Note: If the 3. answer was negative, then the direction will be downwards.

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