The truss is made of three A-36 steel members, each having a cross-sectional area of 400 mm2. A triangular three-member frame A B C. Horizontal member A C of length 1.4 meters is pin-supported at A and roller-supported at C. Pin B is 0.8 meters right and 0.8 meters up from A, with P downward and 5 kilo Newtons rightward on B. Part A Determine the magnitude P required to displace the roller to the right 0.14 mm. Express your answer to three significant figures and include appropriate units.

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".

What kind of waves require a medium to travel? question 6 options: light waves mechanical waves all waves need a medium to travel electromagnetic waves