(b) In unloading a grain from a hold of a ship, an elevator lifts the grain through a distance of 12 m. Grain is discharged at the top of the elevator at a rate of 2.0 kg each second, and the discharged speed of each grain particle is 3 m/s Find the minimum- horsepower motor that can elevate the grain in this way if it is 60% efficient.

(b) In unloading a grain from a hold of a ship, an elevator lifts the grain through a distance of 12 m. Grain is discharged at the top of the elevator at a rate of 2.0 kg each second, and the discharged speed of each grain particle is 3 m/s Find the minimum- horsepower motor that can elevate the grain in this way if it is 60% efficient.

Name: (b) In unloading a grain from a hold of a ship, an elevator lifts the
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: (b) In unloading a grain from a hold of a ship, an elevator lifts the grain through adistance of 12 m. Grain is discharged at the top of the elevator at a rate of 2.0 kg eachsecond, and the discharged speed of each grain particle is 3 m/s Find the m

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 80P: Coal is lifted out of a mine a vertical distance of 50 m by an engine that supplies 500 W to a...

See similar textbooks

Similar questions

At the bottom of an air track tilted at angle , a glider of mass m is given a push to make it coast a distance d up the slope as it slows down and stops. Then the glider comes back down the track to its starting point. Now the experiment is repeated with the same original speed but with a second identical glider set on top of the first. The airflow from the track is strong enough to support the stacked pair of gliders so that the combination moves over the track with negligible friction. Static friction holds the second glider stationary relative to the first glider throughout the motion. The coefficient of static friction between the two gliders is s. What is the change in mechanical energy of the two-glider-Earth system in the up- and down-slope motion after the pair of gliders is released? Choose one. (a) 2smg (b) 2mgd cos (c) 2smgd cos (d) 0 (e) +2smgd cos
Check Your Understanding What potential energy U(x) can you substitute in Equation 8.13 that will result in motion with constant velocity of 2 m/s for a particle of mass 1 kg and mechanical energy 1 J?
Can the power expended by a force be negative?
A 2-kg crate is moved horizontally by 3 m by a 4-N force with a speed of 1 m/s. If that is, how much energy is lost to friction with the surface?
When a driver applies the brakes to keep a car going downhill at constant speed and constant kinetic energy, the potential energy of the car decreases. Where does this energy goes? In contrast, discuss where most of it goes with a hybrid vehicle.
For the given figure, the weight of the 9-ft bar is 5 lb. If F = 4.75, the reaction exerted by the support at O is
You raise a bucket of water from the bottom of a deep well. If yourpower output is 108 W, and the mass of the bucket and the waterin it is 5.00 kg, with what speed can you raise the bucket? Ignorethe weight of the rope.
Calculate the final speed of a 110-kg rugby player who is initially running at 8.00 m/s but collides head-on with a padded goalpost and experiences a backward force of 1.76X10N for 5.50X10s.
A block of mass 400 g is initially held a the bottom of an inclined surface against the spring which is compressed 0.2 m. The block is realeased up a surface to a vertical height of h=1.3m. The force constant of the spring is k=500 N/m, the coefficient of friction between the block and the incline is 0.3, and angle of the incline is 25 degrees. Find the speed of the block at the top of the incline.
An inclined plane of angle θ = 200has a spring of force constantk = 500 N/m fastened securely at thebottom so that the spring is parallelto the frictionless surface as shown inthe figure. A block of mass m = 2.5 kgis placed on the plane at a distanced = 0.3 m from the spring. From thisposition, the block is projected downthe incline toward the spring with initial speed v = 0.75 m/s.By what distance is the spring compressed when the blockmomentarily comes to rest?
How long will it take an 850-kg car with a useful power output of 40.0 hp (1 hp equals746 W) to reach a speed of 15.0 m/s, neglecting friction?Bonus In the problem above, how long will this acceleration take if the car also climbs a 3.00-mhigh hill in the process?
In the question given as follows, determine the work done by the constant force :- The locomotive of a freight train pulls its cars with a constant force of 7 tons for a distance of one-quarter mile?