Engineering Mechanics

Hello,

I'm writing because I have a problem that I don't know how to solve.
I would be thankul if someone could help me solve this problem.

The problem is as follows:

any idea how to analyze trusses? like in method of sections and method of joint thanks in advance

will you please help me with these?

when the acceleration is zero (a=0)
a) s=vt

when the acceleration is constant (uniformly accelerated motion)

a) v = Vot + at
b) s = Vot + 1/2 at
c) v^2 = Vo ^2 + 2as

acceleration (a)

a) a= d^2x/dt = d^2s/ dt

b) a= vdv /dx = vdv / ds

A hollow block is accidentally dropped by a laborer working in a high rise building. four seconds after it strikes the ground, an explosion like sound was heard by the laborer. the velocity of sound is 320 minutes per seconds.

1. In what storey number of the building the laborer is located if the height per storey is
3 meters?
2. What is the time of the hollow block to reach the ground?
3. what is the time of sound to travel the distance equal to the position (height) of the
laborer?

I solved for the loads on a tripod leg that creates a 45 degree angle with the ground. The leg is 2x2" tube. The legs fold up and then swings into open position and stopped by R2. After solving for the loads I rotated the leg to the horizontal position. I solved for the X&Y components. This allowed me to use a beam program with the Y loads and reactions to determine the moment diagram and bending stress. I would then solve for the axial stresses using the X components. I could then combine the bending stress and axial stresses.

I want the solution to this question please

The weather vane of a ship points southeast when the ship is moving east at the rate of 25 km/hr. If the wind velocity is 5 km/hr., from what direction is it blowing?

13. The straight post B rests upon the front edge of the car A as shown which is ascending the 300 incline with an acceleration of 0.5 m/s2.at what angle must the post be inclined in order that it will maintain its position?

17. At what speed must a 1000kg car approach a ramp which has a slope and 12m high at the top such that it will just coast to the top. Assume the constant retarding force due to friction, wind, etc. to be 60kg.