physics

two people carry a heavy electric motor by placing it on a light board 2m long.one person lifts at one end with a force of 700N, and the other lifts the opposite end with a force of 400N.Calculate the weight of the motor and determine where its center of Gravity is Located

  1. 👍
  2. 👎
  3. 👁
  1. The sums of torques respectively the edges of the board are:
    W•x-400•2 = 0
    W• (2-x) -700•2=0
    W•x=800
    2W-W•x -1400 = 0
    2W-800-1400=0
    W=1100 N
    x=800/W =0.73 m

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    Rafi had a board that was 15 1/2 feet long. He cut three pieces off the board that are each 3 7/8 feet long. How much of the board is left? I am confused on how to figure out the answer for the above.

  2. physics ---- really dnt get this at all

    A small electric motor is used to lift a 0.50-kilogram mass at constant speed. If the mass is lifted a vertical distance of 1.5 meters in 5.0 seconds, the average power developed by the motor is

  3. physics

    The efficiency of an electric motor is 20 %. When lifting a body 500 J of energy are wasted. What is the useful work done by the motor? please and thank u!

  4. electric field intensity

    Two 2.0 g spheres are suspended by 10.0 cm long light strings. A uniform electric field is applied in the x direction. If the spheres have charges of -5.0 10-8 C and +5.0 10-8 C, determine the electric field intensity that enables

  1. Math

    Rafi had a board that was 15 1/2 FEET long he cut three pieces off the board that are each 3 and 7/8 feet long how much of the board is left

  2. Math

    A carpenter cut pieces from a 12 foot long board that were 4 3/4 feet long and 3 1/2 feet long. What is the length of the remaining part if the board?

  3. math

    The Citation Sovereign is a small jet that can carry up to 2650 pounds. The number of passengers, p, and the number of suitcases, c, that the airplane can carry are estimated by the equation 180p + 60c = 2650. If 10 people board

  4. algebra

    The power (P) required to run a motor is equal to the voltage (E) applied to that motor times the current (I) supplied to the motor. If the motor data says the motor uses 180 watts of power and the voltage applied to the motor is

  1. physics

    Two people carry a heavy electric motor by placing it on a light board 2.00 m long. One person lifts at one end with a force of 400.0 N, and the other lifts at the opposite end with a force of 600.0 N. What is the weight of the

  2. Astronomy

    Based on what you learned about light, select all of the correct statements from the following list. The only type of electromagnetic radiation that is actually considered light is visible light. High frequency photons carry more

  3. Physics 8B

    A 280 electric motor is 90% efficient, meaning that 90% of the energy supplied to it ends up as mechanical work. If the motor lifts a 210 weight at 3.5 , how much current does it draw? Express your answer using two significant

  4. physics

    A 59 kg diver stands at the end of a 32 kg springboard, the spring board is 3 m long. The board is attached to a hinge at the left end, but simply rests on the right support which is half way along the board. What is the magnitude

You can view more similar questions or ask a new question.