Ap physics (mechanics) Definition and 14 Threads

M robot = (125-25)lb* 1 ft = 25 lb*ft M arm = 25 lb * (x/2 -1 ) M load = 125 lb * (x-1) Mtotal =. 100 + 12.5 x -25 + 125 x -125 = 100 X = 1.09 ft but the correct answer is 1.82 feet, why?

Hello, I am wondering why this take at a solution is wrong. So basically, $F = \frac{dp}{dt} \Rightarrow F = m\frac{dv}{dt} \Rightarrow F_{\text{avg}}\Delta t = m \Delta v$. Quick conversions show that 70 km/hr = 19.4 m/s, and therefore $\Delta t = \frac{0.94}{19.4} = 0.04845$. Therefore, the...

Hi, I was wondering if anybody had the MCQ for the past APPC Mech exams. I'm in the process of studying for my final next week, and it would be a good review. I found the FRQ, but do they not release MCQ? I thought they released mcq for all exams, but I might be wrong- Please let me know- the...

I was able to solve for the velocity of MB and got my answer as 4.47m/s. The main issue right now for me is how to get the angles. I'm really confused on what most people have been posting as we didn't get a groundwork on this topic and so most of the basics I had them self taught. So far I...

First we let the static friction coefficient of a solid cylinder (rigid) be ##\mu_s## (large) and the cylinder roll down the incline (rigid) without slipping as shown below, where f is the friction force: In this case, ##mg\sin(\theta)## is less than ##F_{max}##, where ##F_{CM,max}## is the...

Hi folks! I was teaching myself rotational motion when encountered an example which states as follows: My questions: 1. I do not understand why pulling the cord moves the rotating spool to the right. There were some discussions on stackexchange...

Homework Statement A boy launches a 20 g dart horizontally by a spring gun from a balcony 45 m above the ground. The dart lands 15 m away from the balcony. If the length of the gun’s barrel is 10 cm, what is the average horizontal force applied by the spring?(A) 1.0N (B) 2.0 N (C) 2.5 N (D) 5. N...

Homework Statement For a positively-charged particle at the origin, and a negatively-charged particle lying to its right on the positive x-axis, the electrostatic force on the negative charge is attractive, and Coulomb's Law gives the magnitude of that force: F = k |Q1| |Q2| / x^2 k is...

Homework Statement Gravity causes a centripetal force that allows satellites to travel around planets. How fast must a 102-kg satellite travel to maintain a circular orbit 352 km above Earth's surface? Homework Equations F=m(v^2/r) -----> (F/m) x r= v^2, then square root F= force m=mass...

1. Problem Description: A massless spring hangs from the ceiling with a small object attached to its lower end. The object is initially held at rest at a position y. The object is then released from y and oscillates up and down, with its lowest position being 10cm below y. What is the frequency...

1. Homework Statement A rod (m=6kg, L=3m) at rest on ice (μ=0) is struck by a piece of clay (m=1kg, V=5m/s). The clay sticks. 1) What is the Velocity of the center of mass after the collision? 2) What is the Angular Velocity of the rod following the collision? If the clay did not stick but...

Homework Statement A system of two blocks (each of mass M) are connected by a spring with spring constant k. The system is shoved to the left against a wall and the spring is compressed a distance D. The block(s) are then released. Determine the period of oscillation for the system when the...

Homework Statement An m = 1.3 kg block and an M = 3.0 kg block have a spring compressed between them and rest on a frictionless table. With a stopper in place that prevents m from moving, the spring is compressed and released so that M moves away with a speed 2.0 m/s. The spring is...

Would it be a bad idea to take AP Physics (Mechanics) in 11th grade with no prior Physics experience? I'm currently in 10th grade taking Honors Precalc and Honors Chem. I'm taking AP Calculus BC next year, but I'm not sure what science classes I want to take for 11th/12th grade. I was also...