Previous Problem List Next (1 point) A bucket of water of mass 20 kg is pulled...
(1 point) A bucket of water of mass 30 kg is pulled at constant velocity up to a platform 25 meters above the ground. This takes 20 minutes, during which time 2 kg of water drips out at a steady rate through a hole in the bottom. Find the work needed to raise the bucket to the platform. (Use g = 9.8m/s².). Work = (include units)
(1 point) A bucket of water of mass 30 kg is pulled at constant velocity up to a platform 25 meters above the ground. This takes 20 minutes, during which time 2 kg of water drips out at a steady rate through a hole in the bottom. Find the work needed to raise the bucket to the platform. (Use g = 9.8m/s².) Work = (include units)
Week 1: Problem 11 Previous ProblemProblem List Next Problem Results for this submission Result Entered Answer Preview 4900 J 4900 J incorrect The answer above is NOT correct. (1 point) A bucket of water of mass 15 kg is pulled at constant velocity up to a platform 40 meters above the ground. This takes 12 minutes, during which time 6 kg of water drips out at a steady rate through a hole in the bottom. Find the work needed to...
A bucket weighing 2 kg and a rope of negligible mass is used todraw water from a well that is 40.8 meters deep. Just before thebucket starts being raised from the bottom of the well, the bucket isfilled with 6 kg of water. Unfortunately, there is a hole in the bucketand water leaks out at the rate of 0.12 kg per second. The bucketis pulled up at a constant rate of 0.8 meters per second.(a)How much water is in the...
# 3 Points possible: 1. Total attempts: 6 A bucket that has a mass of 20 kg when filled with sand needs to be lifted to the top of a 15 meter tall building. You have a rope that has a mass of 0.4 kg/m that must be secured to the bucket. It takes I meter of rope to secure the bucket. Once the bucket reaches the top of the building it only has mass 12 kg because there was...
A bucket that has a mass of 10 kg when filled with sand needs to be lifted to the top of a 30 meter tall building. You have a rope that has a mass of 0.4 kg/m that must be secured to the bucket. It takes 1 meter of rope to secure the bucket. Once the bucket reaches the top of the building it only has mass 6 kg because there was a hole in the bottom and sand was...
HW7: Problem 14 Previous Problem Problem List Next Problem (1 point) A gas station stores its gasoline in a tank under the ground. The tank is a cylinderlying horizontally on its side. (In other words, the tank is not standing vertically on one of its flat ends.) If the radius of the cyinder is 0.5 meters, its length is 8 meters, and its top is 1 meter under the ground, find the total amount of work needed to pump the...
Previous Problem List Next (1 point) A cone is to be built from stone so that it has height 10 feet and a base with radius 3. (The base of the cone will lie on the floor.) Suppose the density of the stone used to make the cone is 70 lb/ft?. Calculate the work required to build the cone from the ground up. Work = (include units) Preview My Answers Submit Answers Previous Problem List Next (1 point) Suppose the...
Previous Problem Problem List Next Problem (1 point) A tank contains 60 kg of salt and 1000 L of water. Pure water enters a tank at the rate 12 L/min. The solution is mixed and drains from the tank at the rate 6 L/min. (a) Write an initial value problem for the amount of salt, y, in kilograms, at time t in minutes: !!! (kg/min) y(0) = 60 !!! kg (b) Solve the initial value problem in part (a) y(t)...
Section 3.7 Free Mechanical Vibrations: Problem 4 Previous Problem Problem List Next Problem (1 point) This problem is an example of critically damped harmonic motion. A mass m = 8 kg is attached to both a spring with spring constant k = 200 N/m and a dash-pot with damping constant c = 80 N s/m The ball is started in motion with initial position zo = 7 m and initial velocity vo = -39 m/s. Determine the position function r(t)...