Ask Experts Questions for FREE Help !
    ssfire's Avatar
    ssfire Posts: 1, Reputation: 1
    New Member

    Dec 6, 2007, 04:04 PM
    Physics answer!
    A board that is 1.5 m long is supported in two places. If the force exerted by the first support is 25N and the force exerted by the second is 62N, what is the mass of the board?
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member

    Dec 6, 2007, 04:09 PM
    I assume that the whole system is at rest.

    If this is the case, then what conclusions can you make about the total upward force compared to the total downward force?
    Polokid16's Avatar
    Polokid16 Posts: 11, Reputation: -1
    New Member

    Dec 8, 2007, 09:06 PM
    Assuming that the system is at rest:

    "_" - subscript

    F_total = 25N + 62N = 87N

    Now use the formula F_g = ma and rearrange it

    m = F_g / a

    Note: a = g = 9.81m/s^2

    m= (87N) / (9.81m/s^2) = 8.9kg

Not your question? Ask your question View similar questions


Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.

Check out some similar questions!

Physics [ 1 Answers ]

An electron starts from rest 5.50 cm from the center of a uniformly charged insulating sphere of radius 2.90 cm. If the sphere carries a total charge of how fast will the electron be moving when it reaches the surface of the sphere? Note: Assume a reference level of potential V = 0 at r= infinity

If the correct answer is May cgs, $15,500 how is the answer correct need to see work [ 1 Answers ]

P23-A The budget committee of Vinning office supply Co. Has assembled the following data. As the business manager, you must prepare the budgeted income statements for May and Jun 2006. A. Sales in April were $42,100.. You forecast that monthly sales will increase 2.0% in May and 2.4% in June.

Help with physics! [ 2 Answers ]

Please help with this physics problem! a. A 50kg water skier is pulled on a lake by a boat with a horizontal force of 400N. If the wind and current applies another force of 100N at an angle of 30degrees relative to the straight-line direction of the boat, what is the skiers acceleration? B.)...

Physics please help [ 1 Answers ]

I really don't understand this problem: Two planets X and Y travel counterclockwise in circular orbits about a star. The radii of their orbits is in the ratio 3:2. At some time, they are aligned, making a straight line with the star. Five years later, planet X has rotated through 89.0...

Gr 11 physics.. Need help again [ 0 Answers ]

An amateur ball player runs at an average speed of 6.0 m/s between home plate and first base and 9.0 m/s between first and second. If the distance between the bases is 27.4 m and the base lines form an angle of 90 degrees, calculate his average velocity. Ans: 5.1 m/s A diver on a...

View more questions Search