# Physics

A building has a symmetric roof made from two straight sections at an angle of 20�‹ above the horizontal. The sides are uniform and have a mass of m = 1800 kg. Find the magnitude of the horizontal force that this roof exerts at the top of the wall, pushing it outward. Before you start your calculation, draw a free body diagram of one side of the roof and label relevant distances.

Im not sure if I even know what it looks like. maybe something like this?:
-
/
-
Even if it is right, i have no clue on how the forces react in this situation. Please help!

1. 👍
2. 👎
3. 👁
4. ℹ️
5. 🚩
1. Write moments about the wall top on one half of the building. That will give you the horizontal force pushing on the roof top. The horizontal force on the wall top must be equal and opposite.

1. 👍
2. 👎
3. ℹ️
4. 🚩
👤
bobpursley

## Similar Questions

1. ### trigonometry

Two buildings with flat roofs are 60m apart. From the roof of the shorter building, 40m in height, the angle of elevation to the edge of the roof of the taller bldg. is 40°. How high is the taller bldg.?

2. ### physical

baseball is hit with a speed of 30.0 m/s at an angle of 50 It lands on the flat roof of a 10m tall nearby building, If the ball was hit when it was 1.5 m above the ground, what horizontal distance does it travel before it lands on

3. ### trigo

A television antenna is on the roof of a building. From a point on the ground 36.0 ft from the building the angle of elevation of the top and bottom of the antenna are 51° 23' & 42°10', respectively. How tall is the antenna?

4. ### Math

A lion enclosure is made up of five straight fence sections. Three sections are 20 m in length and the other two sections are 15.5 and 32.5 m. Find the perimeter of the enclosure.

1. ### Geometry

To repair a roof that is 4 meters high, Mr. Russo leans a 5-meter ladder against the side of the building. To reach the roof, how far away from the building should he place the base of the ladder?

2. ### trigonometry

Two buildings with flat roofs are 60 m apart. From the roof of the shorter building, 40 m in height, the angle of elevation to the edge of the roof of the taller building is 40°. How high is the taller building? Provide an

3. ### Physics

A hammer is thrown horizontally from the flat roof of a tall building at a velocity of 10m/s and hits the ground below after 5 seconds. (a) How high is the roof? (b) How far from the building does it land.

4. ### Math

A running track consists of two straight sections with semi-circular ends. If the straight sections measure 100 metres and one compete lap on the inside of the track measures 1/2 k, what is the distance x between the two

1. ### physics

A ball thrown horizontally at 13.0m/s from the roof of a building lands 21.4m from the base of the building. How tall is the building?

2. ### Calc

A ball is thrown straight up from the top of a 200 foot building with an initial velocity of 40feet/second. acceleration due to gravity is -32feet/second. a) find a formula for the height of the ball at time t. b) how high does

3. ### physics

A stuntman plans to run across a roof top and then horizontally off it to a land on the roof of the next building . The roof of the next building is 4.8 m below the first one and 6.2 m away from it . Can he make the jump if his

4. ### Physics

A baseball is hit with a speed of 27.0 m/s at an angle of 42.0 deg. It lands on the flat roof of a 10.0 m-tall nearby building. If the ball was hit when it was 1.0 m above the ground, what horizontal distance does it travel before