A uniform cable hanging over the edge of a tall building is 40 feet long and weighs 60 pounds. How much work is required to pull 10 feet of the cable to the top?

Ed, Edd and Eddy love to play on a seesaw. It consists of a 1-kg board with a length of 8 meters. One day, the other end broke down. They had to cut it by a meter and maintain the pin support in its original position. Then, they tried the seesaw altogether. Ed (m = 55kg) sat on one side about 3m from the pin while Edd (m = 40kg) and Eddy (m = 40kg) on the other side. If Edd was about 3m as well from the pin, calculate the following:   The manitude of the reaction force (N) exerted by the pin support on the board. Assume Eddy is in between Ed and Edd. (mass of board = 1kg)

A uniform tabletop with a mass of 415kg has a length of 2.50m. A 775kg box is placed 0.800m from one side of the table and a 265kg box is placed 1.80m from the same side of the table. What are the forces from the table legs on the tabletop?

A combination work of art/musical instrument is illustrated.(Figure 1) Six pieces of identical piano wire (cut to different lengths) are hung from the same support, and masses are hung from the free end of each wire. Each wire is 1, 2, or 3 units long, and each supports 1, 2, or 4 units of mass. The mass of each wire is negligible compared to the total mass hanging from it. When a strong breeze blows, the wires vibrate and create an eerie sound. Figure ** B D C D E F < 1 of 1 Part A Rank each wire-mass system on the basis of its fundamental wavelength. Rank from largest to smallest. To rank items as equivalent, overlap them. ► View Available Hint(s) largest Submit Part B As)c]D]E F 9D The correct ranking cannot be determined. Reset Help smallest Rank each wire-mass system on the basis of its wave speed. Rank from largest to smallest. To rank items as equivalent, overlap them. ► View Available Hint(s)

Question 4 please

A basket of negligible mass hangs from the school roof by a spring 5.0m long, It hangs 6.0m above the ground. Three students of equal mass, gently lower themselves into the basket and the spring stretches 1.0m for each one. They climb out and then one climbs a ladder on the roof and steps off, landing in the basket and stretching the spring until it just touches the ground. How high was the ladder above the rooftop?

An athlete strengthens her leg and knee by doing "leg curls." While sitting on a bench with the leg initially bent at the knee, she supports a weight with the foot. She then slowly raises the foot and lower leg, with the upper leg held stationary. Find the tension in the quadriceps tendon for the position shown in the figure below. (Let w = 237 N, D = 43 cm and d = 5.2 cm.) Quadriceps tendon 60° W