A 20.0-m-long uniform beam weighing 880 N rests on walls A and B, as shown in the figure (Figure 1). Part C Find the force that the wall B exert on the beam when the person is standing at D. Express your answer using two significant figures. Π ΑΣΦ FB = Submit Request Answer ? N

Q: 9 and 10. Thanks.

A: 9.The equation for dot product

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Q: 9&10 please! Thank you!

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Q: Gram is the fundamental unit of mass in SI system

A: SI base unit of mass is kilogram.It is represented by letter Kg.

Density of Solids

The density of a substance refers to how much matter is present in a given amount of space. It is expressed as the ratio of the mass of the substance to its volume.