How much work is done lifting a 20 pound object from the ground to the top...
Solve both please If a cup of coffee has temperature 96°C in a room where the ambient air temperature is 18°C, then, according to Newton's Law of Cooling, the temperature of the coffee after t minutes is T(t) 18 + 78e-t/46. What is the average temperature of the coffee during the first 20 minutes? average temp How much work is done lifting a 40 pound object from the ground to the top of a 20 foot building if the cable...
(1) Suppose you lift a stone that has a mass of 5.3 kilograms off the floor onto a shelf that is 2 meters high. How much work have you done? Joules (2) Suppose you lift a laptop that weighs 3.2 pounds off the floor onto a shelf that is 4 feet high. How much work have you done? foot-pounds (3) The force on a particle is described by 9x^3−1 pounds at a point xx feet along the x-axis. Find the...
9. A crane lifts a 2,000 lb load vertically 30 ft with a 1" cable weighing 1.68 lb/ft. (a) How much work is done lifting the cable alone? (b) How much work is done lifting the load alone? (c) Could one conclude that the work done lifting the ca- ble is negligible compared to the work done lifting the load? 9. A crane lifts a 2,000 lb load vertically 30 ft with a 1" cable weighing 1.68 lb/ft. (a) How...
A pile driver works by lifting a large mass and dropping it to the ground. A driver used to put pilings in the ground for a tall building has a mass of 6150 kg and is raised to a height of 2.5 m in 0.48 s. (a) How much work is done by the engine each time the weight is lifted? (b) What horsepower engine must be used to run the pile driver?
heeeelp 3. An elevator at Studious University has stopped between the first and second floors. The ca attached to the car wei ghs 5 pounds per foot and is 50 feet long. The car itself weighs 1000 pounds, including two 100 pound students who are trapped inside. To rescue the students, the r must be lifted S Teer by manually winding the cable onto a pulley at the top of the building a. How much work must be done? b....
its chapter 6.4 or something work problems This is a Calc question you're supposed to read the text next to the picture and answer questions from A to E Take-Home 31 Directions: Do all work on separate paper. Due date is the beginning of class on The time the assignment is due is the BEGINNING OF CLASS. Late work will not be accepted! Submit the assignment early so you are not late. Do not put work on this paper, provide...
How much power is done against gravity in lifting a 3Kg object through a vertical distance of 40cm in 10 seconds?
(High school physics) 1a) How much work is done in lifting a 25kg Christmas gift to a height of 15m? 1b) How much work is needed after lifting the Christmas gift, to carry it horizontally 250 m?
11. Lifting an elevator cable An electric elevator with a motor at the top has a multistrand cable weighing 4.5 lb/ft. When the car are out when the car is at the top floor. How much work does the is at the first floor, 180 ft of cable are paid out, and effectively 0ft motor do just lifting the cable when it takes the car from the first Aoor to the top?
21. A worker on a roof 30 ft. above the ground needs to lift a rectangular banner from the rud. When the work is done, the upper (shorter) edge of the banner is aligned with the edge of the roof and the banner hangs freely from the roof. The banner is 10 ft. by 30 ft. and has two ropes attached to the shorter side Each of the ropes weighs 4 pounds per foot; the banner weighs 5 pounds per...