1 - A uniform plank of length 8 m and mass 20 kg rests on two posts. One post is

Question

1 - A uniform plank of length 8 m and mass 20 kg rests on two posts. One post is at the end of the plank, the other a distance 6.9 m from the first post. What is the force exerted by the first post on the end of the plank? Your answer should be given to the nearest tenth of a Newton.

2 - A clean room is kept at a positive gauge pressure of 0.019 kPa with respect to the outside to minimize contamination from the outside. Assume that the door to the room has dimensions 0.7 m x 1.9 m. What is the net outward force on the door? Give your answer to the nearest tenth of a Newton.

Explanation / Answer

a)20*g=F1+F2

and F1*4=F2*2.9

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.