1. D

    Converting Density to Molecular Weight

    Greetings all. I am currently in the midst of a Final Acceptance Testing for one of our customers that is purchasing some Density Meters. Physics is not my strong point as I am a Test Engineer and I desperately need some help. Our product is spec'd out such that it reports Density, Pressure...
  2. A

    L Angle Capacity

    Hi there people, Need help with our situation. Mirror: 2440mm x 1500mm x 50mm wide. Weight: 150kg We want to mount the mirror against a brick wall (floating style) and plan on using aluminium L angles to support the TOP and bottom of the mirror. I would like to determine if the 50mm x...
  3. A

    Need Help: L angle capacity

    Hi there people, Need help with our situation. Mirror: 2440mm x 1500mm Weight: 150kg We want to mount the mirror against a brick wall (floating style) and plan on using aluminium L angles to support the TOP and bottom of the mirror. I would like to determine if the 50mm x 50mm x 3mm...
  4. A

    Finding density of an object with the weight and density of fluid?

    Hello, I am a bit stuck with a question "A large container of water initially reads 0.485 kg. A ball is hung in the air from another set of scales which initially read 0.112 kg. The ball is lowered until it is fully submerged. The readings on both scales are now 0.496 kg and 0.101 kg...
  5. N

    Friction and Weight

  6. G

    Basic Question - Mass vs Weight

    My daughter had a question from school and it confused me. The question reads: True of False; Both weight and mass measure how heavy (or light) an object or a substance is. My daughter circled false and I agree with her. But she missed that question. Mass is different than weight. Weight...
  7. J

    Statics problem - determine the minimum weight

    I have two balls in a tube one a top of another zig zag postioned determine the minimum weight at which the tube wont tip over https://kek.gg/i/kpfvV.jpg r1=r2=120mm or 0.12m D=400mm=0.40m G=200N What I managed to get : r3=r1+r2=0.24m length between AB=D-r3=0.16m...
  8. H

    Momentum, friction and acceleration in a small sized light weight robot

    I have been working on a problem related to a robot that I am building. I am trying to find a formula to calculate the force needed to apply through motors to accelerate and turn the robot. The end goal of this task is to find a way to calculate the maximum force that a motor can apply on a...
  9. S

    Weight question

    Need some help with question 12 and 13. I got 12 right and I just used my intuition. It seemed obvious that if the left side had 8/15 of the weight then it the center of mass was 7/15 away from it(maybe that's faulty reasoning?) . The verbal explanation given to me explained it in terms of...
  10. J

    Work-energy theorem problem on a hanging weight

    Hi everybody ... Its been a while since I've been on the site , however I've come across a problem which on first reading appears fairly straightforward but which has got me flummoxed. The problem is as stated below ... and has to be solved using Work-Energy equations (Kinetic and Potential...
  11. L

    weight of fluid block

    why the formula of weight of fluid block is given by the formula of ρg[ (R^2) - pi(R^2) ] 1? what does the 1m mean here ? shouldn't it = ρg (pi) (R^2) h ?
  12. A

    weight or mass of water

    density of water we say is equal to 1 g/cubic cm. can we say that 1 cubic cm volume of water will weigh 1 gram (mass of water)? Can we deduce such result from density of the given substance? Kindly enlighten me. with warm regards, Aranga
  13. F

    Lever Weight Transfer Vectors

    Hi guys, I don't know if this is being posted in the correct location. I am looking for an answer to a question I am having trouble answering. I have a lever transferring the weight to an air cylinder and I am trying to find the angle that the vector is being applied to the pivot points 1...
  14. N

    centrifugal force and net weight

    When an object, orbiting in circular path, experiences the sensation of being thrown outward away from the centre of circle. We often think that an outward force or centrifugal force is responsible for this trend. But it is wrong idea. Inertia is responsible for this. Since earth rotates around...
  15. W

    force/impule of lower a weight fast and slow

    If I was to lower 100Ib down 1m in 1 second and then lower the object 1m in .5 of a second twice, with my arm, what would the forces/impulses be on my arm. Would the faster velocity lower, let the weight gain more kinetic energy and put more force/impulse on the arm in the same time frame.
  16. J

    Weight of object = Force of buoyancy: can I use this when density of object is greatr

    My text book says that for floating objects we can use the equation weight of the object equals to force of buoyancy. They call this equation, floating object in equilibrium on surface. However, what happens when the density of the object is greater than the density of the fluid and the object...
  17. B

    Race car weight transfer

    I am building a database in Access to assist in chassis setup of race cars. Here is what I am dealing with. A race car has 1 spring for each wheel Each spring has a jack bolt, which is a way to adjust the compression on that spring. Each jack bolt has 16 threads per inch. I have on the...
  18. B

    What happens to your weight

    Need help to understand Physics basic concepts Suppose a planet is shrinking to is one-tenth of its original diameter without change in its mass and you are standing on the surface of that planet. What happens to your weight? it would be more or less? Thanks
  19. A

    spring weight noob problem

    i have two plates and between it their is leaf spring inside, and in top plate i have a 100lb weight if i put a scale that measures the weight in between the actual weight and the first plate would it be less than 100lb? would it be absorb by the leaf spring? this is stationary
  20. C

    Calculating mass from weight in lbs.

    So, this has been bugging me for a while. I weigh about 150 lbs, and I want to calculate my mass in kg. A lot of forums are saying to simply divide my weight in lbs by 2.2, as there are ~2.2 kg/pound. However, my reasoning tells me that this would be my weight in kilograms, not my mass. Here's...