Reactions Example 1

The video tutorial explains how to draw free body diagrams for two massless beams subjected to external and reaction forces. It begins with an introduction to the problem, followed by a detailed analysis of each beam. The first beam is influenced by a 30 Newton force and pin supports, while the second beam is connected to roller supports. The tutorial emphasizes the importance of understanding reaction forces and Newton's third law. Although the video does not solve for the reaction forces, it sets the stage for further analysis using Newton's laws.

What is the primary task described in the introduction of the video?

• Calculating the mass of the beams

• Determining the speed of the beams

• Analyzing the color of the beams

• Drawing free body diagrams for massless beams

Which force is acting on the first beam as described in the video?

• A 30 Newton force

• A 70 Newton force

• A 50 Newton force

• A 10 Newton force

What assumption is made about the direction of reaction forces at the pin supports?

• They are assumed to be positive towards the right and upwards

• They are assumed to be zero

• They are assumed to be positive towards the left and downwards

• They are assumed to be negative

What type of support is Point C connected to in the second beam?

• A fixed support

• A roller support

• A hinge support

• A cantilever support

According to Newton's third law, how are the forces at the pin connection between the beams described?

• They are unequal and in the same direction

• They are equal and in the same direction

• They are equal and opposite

• They are unequal and opposite