When a 69kg man stands on the end of a springboard (a type of diving board), the

Question

When a 69kg man stands on the end of a springboard (a type of diving board), the board deflects by 8.0cm .
1. If a 40 child stands at the end of the board, the deflection is
a- 9.3cm
b- 2.3cm
c- 4.6cm
d- 7.0cm

2. A 69kg man jumps up and lands on the end of the board, deflecting it by 12cm . At this instant, what is the approximate magnitude of the upward force the board exerts on his feet?
a-1000N
b- 300N
C- 680N
d- 1400N

3. If the board is replaced by one that is half the length but otherwise identical, how much will it deflect when a 69 kg man stands on the end?
a-8cm
b-2cm
c-1cm
d-4cm

Explanation / Answer

c- 4.6cm C- 680N d-4cm

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