Apendulum bob of mass m is attached to a light string of length l and is also attached to a spring of force constant k. with the pendulum in the position shown in the figure, the spring is at its unstressed length. if the bob is now pulled aside so that the string makes a small angle θ with the vertical and released, what is the speed of the bob as it passes through the equilibrium position? hint: recall the small-angle approximations: if θ is expressed in radians, ana i f θ< < 1, then sin θ ~tan θ θ and cos θ ~ 1-1/2θ2

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?

In a set amount of time, a battery supplies 25j of energy to an electric circuit that includes two different loads. one of the loads produces 10 j of heat energy during this time interval. how much heat energy is produced by the second load in this time? explain your answer

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2