physics

A uniform wooden plank of length L = 6.0 m and mass M = 90 kg rests on top of two sawhorses separated by D = 1.5 m, located equal distances from the center of the plank. You try to stand on the right-hand end of the plank. If the plank is to remain at rest, how massive can you be?

  1. 👍 0
  2. 👎 0
  3. 👁 83
  1. 90 kg at 1.5 / 2 meters from center of plank exactly balanced your mass m at 3 meters from center
    90 * 1.5 / 2 = m * 3
    45 * 1.5 = 3 m
    m = 22.5 kg

    1. 👍 1
    2. 👎 1
    👨‍🏫
    Damon

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A book of mass 7 kg rests on a plank. You tilt one end of the plank and slowly increase the angle of the tilt. The coefficient of static friction between the book and the plank is 0.40. What is the maximum angle of tilt for which

  2. PHYSICS 1 ..'''''''''''''''''''''''' helllpppppppp

    A girl of mass (Mg) is standing on a plank of mass (Mp). Both are originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity (vgp) to the right

  3. Physics

    In frozen Minnesota the winter sports carnival includes some unusual events. Since it is dangerous to run on ice, each runner runs on a heavy (240 kg) and long (40 m) wooden plank, which itself rests on the smooth and horizontal

  4. physics

    You know that you can safely stand on the hang-over end of a heavy plank that rests on a table. How far depends on your mass and the mass of the plank. Suppose you can stand on the end of a plank that overhangs the edge of the

  1. Physics(please check)

    A 53-N crate is suspended from the left end of a plank. The plank weighs 21 N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.30 m from the

  2. physics

    A 62kg person lies flat on uniform plank of mass 15kg.The plank, with the person lying on it,is placed on a brick at the head and a bathroom scale at the foot,both under the plank.The persons toe to head dist is 1.56m.The length

  3. science(physics)

    A bullet of mass 100g moving with20m/sec .Strikes a wooden plank and peretrates up to 20cm.Calculate the resistance offered by the wooden plank.

  4. Physics(Please check)

    A uniform plank of length 5.0 m and weight 225 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 404 N walk on the

  1. physics

    A cat walks along a uniform plank that is 4.00 m long and has a mass of 7.00 kg. The plank is supported by two sawhorses, one 0.44 m from the left end of the board and the other 1.60 m from its right end. When the cat nears the

  2. physics

    a man uses a roqe to haul box of weight 600N up an inclined wooden plank of effective lenght 3.0m and onto a platforn 1.0m high if indoing so, he exerts a force of 400N on the rope calculate (1) the frictional force between the

  3. science

    A bullet having a mass of 10g and moving with a speed of 1.5m/s penetrates a thick wooden plank of mass 90g. The plank was initially at rest. The bullet gets embedded in the plank and both moves together. Determine their velocity

  4. trigonometry

    to unload hollow blocks from the cargo truck a wooden plank whose end rests against the truck's platform 1.5 meters above the ground is used. if it is inclined 37%49 with the ground, how long is the wooden plank?

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