Physics

A lunch tray is being held in one hand. The mass of the tray itself is 0.240kg, and its center of gravity is located at its geometrical center. on the tray is a 1.00 kg plate of food and a 0.300kg cup of coffee. Obtain the force T exerted by the thumb and the force F exerted by the four fingers. Both forces act perpendicular to the tray, which is being held parallel to the ground. Find T= (DOWNWARD) and F (upward)

You have to model how far apart the thumb and forefingers are. Sum moments around the thumb: forefingers, coffee, plate, and tray. The sum has to be zero, that will give you the forefingers force. Then, to get the thumb force, add forces vertical and set to zero.

  1. 👍 0
  2. 👎 0
  3. 👁 136
asked by Cavin

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A lunch tray is being held in one hand, as the figure below illustrates. The mass of the tray itself is 0.182 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.08 kg plate of food and a 0.279

    asked by Katie on March 16, 2012
  2. Physics

    A lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is 0.220 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.00 kg plate of food and a 0.230 kg cup

    asked by Ali on April 4, 2008
  3. physics

    lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is 0.240 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.00 kg plate of food and a 0.300 kg cup

    asked by CJ on March 28, 2007
  4. Physics

    I have no idea of how to solve this problem. Please help. lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is 0.200 kg, and its center of gravity is located at its geometrical center.

    asked by Jim on March 22, 2007
  5. physics

    A tray held horizontally by a waiter. The tray has a weight of 6N and supports a drink of weight 3N. The waiter provides a force at P (BTW P is at one end). The tray my pivot about point T (BTW T is 5cm away from P) Find the force

    asked by Sharda on August 18, 2014
  6. Physics please check

    A lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is 0.280 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.00 kg plate of food and a 0.210 kg cup

    asked by Mary on April 24, 2007
  7. physics

    you are trying to balance a tray of dishes to make it easy to carry. at one end of the 0.6m tray are four plates with total mass 0.5 kg with their centres of mass exactly above the left edge of the tray. how far from the left edge

    asked by Anonymous on March 17, 2016
  8. physics

    The mass of the tray itself is 0.182 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.08 kg plate of food and a 0.279 kg cup of coffee. Assume L1 = 0.0590 m, L2 = 0.138 m, L3 = 0.258 m, L4 =

    asked by Katie on March 13, 2012
  9. Physics repost please check

    A lunch tray is being held in one hand, as the drawing illustrates. The mass of the tray itself is 0.280 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.00 kg plate of food and a 0.210 kg cup

    asked by Mary on April 24, 2007
  10. Maths

    a tray holds 2.3 liters of water when full (2300 cm3) Calculate the height (h cm) of the tray Tray = L=15cm B=20cm H=?

    asked by Maths on June 14, 2009

More Similar Questions