A 4.5-m-long wooden board with a 24-kg mass is supported in two places. One support is directly under the center of the board, a

Question

Schach

3 months ago

14

A 4.5-m-long wooden board with a 24-kg mass is supported in two places. One support is directly under the center of the board, a

nd the other is at one end. What can be said about the forces exerted by the supports?

Physics

2 answers:

Ostrovityanka [3.2K] · Answer 1 · 2026-03-21T14:02:46+03:00

All the weight of the wooden board rests solely on the support situated at the center of the rod, while the other support positioned at one end experiences no reaction force, resulting in a 0 reaction force.

Thus, the reaction force at the central support corresponds to the weight of the board, whereas the end support has 0 reaction force.

inna [3.1K] · Answer 2 · 2026-03-21T14:01:54+03:00

Answer:

The force applied by the support at the board's center pushes upward and matches the board's weight, which is mg ( 24x9.81)N, totaling 235.44N.

At the opposite end, the support does not contribute any force since the board is already stabilized by the central support.

Explanation:

An elaborate explanation and calculation can be found in the image below