Work energy

Question Details
Three masses m1= 5.0 kg ; m2= 10.0 kg ; m1= 15.0 kg are attached by a strings over frictionless pulleys. The horizontal surface exerts a force of friction of 30N on m2. If the system is released from rest, use energy concepts to find the speed of m2 after it moves 4.0 meter









You need to describe the figure that goes with this. Are m1 and m3 hanging from pulleys at the ends of the horizontal surface? Is 15kg supposed to be m3? You call it m1.

The energy concepts you can use are to equate
Potential energy decrease = (frictional work done) + (kinetic energy increase).

The frictional work done is 30Nx4m = 120 J.
Get the new velocity V from the kinetic energy increase. I assume all three masses will have that velocity.

If one mass rises while another falls an amount X, the potential energy decrease will be (mass difference)* g * X

Sorry there was a mistake on my part

M1=5 kg
M2=10 kg
M3=15 kg

while m1 and m3 are hanging with a support of a pulley and M2 reside on the horizontal surface

  1. 👍 0
  2. 👎 0
  3. 👁 136
asked by Harry
  1. dgfdg

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. English

    Restate the theme you selected in the previous question. Support the theme with two details from "Anna's Secret Wish". In the previous question I chose A which is "Each person sees beauty in a different way." I'm having trouble

    asked by Em on November 13, 2018
  2. literature

    i have to write some paragraphs about comparing the details of the actual Salem witchcraft trials with details presented in the Crucible. i found information in my book and on a couple of sites. but i just need help formulating a

    asked by y912f on January 10, 2009
  3. Physics

    Three masses that are 10 kg each are located at the corners of an equilateral triangle, with side length of 0.55m. What is the magnitude of the total force acting on one mass due to the other two masses? The answer is supposed to

    asked by James on July 28, 2012
  4. chm

    Why are the atomic masses listed in the periodic table not whole numbers? Answer Scientists have yet to make the precise measurements. That would be too much of a coincidence. ??>>The atomic masses are average atomic masses. or

    asked by jj on February 23, 2013
  5. physics

    If two different masses have the same kinetic energy, their momenta are: 1. inversely proportional to their masses 2. inversely proportional to the square roots of their masses 3. proportional to the squares of their masses 4.

    asked by Anonymous on October 28, 2011
  6. Physics

    Two equal masses(1 and 2) are connected by an ideal rope across a pulley. This system is on a larger block A; 1 is on top of A, while 2 is hanging off the side, and the pulley rests on the corner of A. The question is what is the

    asked by Kuen on July 7, 2013
  7. English

    in a paragraph......details grow out of the major details and also give information about..... details. what are the best suitable words for these two blanks?

    asked by Sonia on November 5, 2010
  8. english

    Help please. 26. Write a paragraph that answers the questions below. Include at least two supporting details or examples. In “the literature of the Americas,” Kimberly Koza writes; “By discovering the literature of our

    asked by Jerry on September 17, 2017
  9. Math-Algebra

    1. Finf the width of a rectangle whose area is 36 sq in. And length is 9in. 2. The attraction F of any two masses m1 and m2 foe each other varies directly as the oroduct of the masses and inversely as the square of the distance d

    asked by Mckenna Louise on November 24, 2013
  10. physics

    Three masses are arranged on a flat surface as shown. Two of the masses are as follows: m2 = 16.3 kg and m3 = 66.5 kg. A horizontal force of 519 N applied to m2 accelerates the masses across the floor, which has a coefficient of

    asked by dillon on December 5, 2010
  11. Physics

    Four identical masses of 800kg each are placed at the corners of a square whose side length is 10.0cm. What is the net gravitational force (magnitude and direction) on one of the masses, due to the other three? I think I have to

    asked by Jaime on January 20, 2009

More Similar Questions