Ablow-back device for a diameter d = 0.22 (in) under p = 24000 [lb/in? ) pressure connects a breech block with a mass m = 1/2 (slug/32.2] to the origin, where x = 0, by a spring, which exerts a force of 3 (lb) when the breech block is moved back by 1.5 in), so that the spring constant is k=3/1.5 lb/in. friction is so small that the measuring instruments at hand do not detect any friction (3.1) find a formula for the force on the breech block in terms of pressure, diameter, and spring. (3.2) find an algebraic formula for the acceleration x(t) of the breech block at time t, for 0 0 when x(ti) = 0. (when is the breech block back at 0? )

In physics the desire of an object to keep doing what it is doing is termed?

1134567 a jet with mass m = 1.1 ă— 105 kg jet accelerates down the runway for takeoff at 2 m/s2. 1) what is the net horizontal force on the airplane as it accelerates for takeoff? 2.2*10^5 n your submissions: 2.2*10^5 computed value: 220000submitted: saturday, january 26 at 2: 41 pm feedback: correct! 2) what is the net vertical force on the airplane as it accelerates for takeoff? 0 n your submissions: 0 computed value: 0submitted: saturday, january 26 at 2: 41 pm feedback: correct! 3) once off the ground, the plane climbs upward for 20 seconds. during this time, the vertical speed increases from zero to 21 m/s, while the horizontal speed increases from 80 m/s to 95 m/s. what is the net horizontal force on the airplane as it climbs upward? n 4) what is the net vertical force on the airplane as it climbs upward? n 5) after reaching cruising altitude, the plane levels off, keeping the horizontal speed constant, but smoothly reducing the vertical speed to zero, in 13 seconds. what is the net horizontal force on the airplane as it levels off? n 6) what is the net vertical force on the airplane as it levels off?

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.