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Math Help - Need help with these questions, thanks

  1. #1
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    Need help with these questions, thanks

    I am trying to figure this out and having problems solving it.

    Q#1
    Calculate the mass in grams for an object whose weight is 33.0 N
    Total of mass in grams?

    Q#2
    Calculate the acceleration of an object whose mass is 5.26 tonne if an unbalanced force of 285 kN is pushing this object.
    Answer of acceleration?

    Q#3
    a 30 kg block with an initial velocity of 10m/s due west slides 15m along a rough level floor and comes to rest. It takes 3 seconds to stop. The stopping force on the block is??

    Q#4
    A hockey puck is set in motion across a level frozen pond. If the frictional forces are neglected, the force required to keep the puck sliding at a constant velocity is
    A> 0 newtons
    B> equal to the weight of the puck
    C> the weight of the puck divided by its mass
    D> the mass of the puck multiplied by 9.81 m/s^2
    E> none of the above.

    THANKS for your help

    PLEASE show all work so I can figure it out.

    Jo
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  2. #2
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    Quote Originally Posted by bradycat View Post
    I am trying to figure this out and having problems solving it.

    Q#1
    Calculate the mass in grams for an object whose weight is 33.0 N
    Total of mass in grams?

    W = mg. You have W = 33N and g = 9.8m/sē. So you can easily calculate mass(m). But in this formula, mass is in kg. 1000g = 1kg. kilo is the prefix meaning 'a thousand'. Should be an easy conversion.

    Q#2
    Calculate the acceleration of an object whose mass is 5.26 tonne if an unbalanced force of 285 kN is pushing this object.
    Answer of acceleration?

    F = ma. First convert your data into standard SI units. F = 285 kN = 285 000 kN. m = 5.26 tonnes = 5260 kg.

    Q#3
    a 30 kg block with an initial velocity of 10m/s due west slides 15m along a rough level floor and comes to rest. It takes 3 seconds to stop. The stopping force on the block is??

    Once again, F = ma.
    You only have mass for now and need to find acceleration to calculate the force. Assuming acceleration (a) is constant, use the formula
    d = Ut + 0.5atē where d = distance, U = initial velocity, and t = time taken.

    Q#4
    A hockey puck is set in motion across a level frozen pond. If the frictional forces are neglected, the force required to keep the puck sliding at a constant velocity is
    A> 0 newtons
    B> equal to the weight of the puck
    C> the weight of the puck divided by its mass
    D> the mass of the puck multiplied by 9.81 m/s^2
    E> none of the above.

    Newton's First Law of Motion (Intertia): In the absence of force, a body either is at rest or moves in a straight line with constant speed.

    THANKS for your help

    PLEASE show all work so I can figure it out.

    Jo
    I've shown you what you need to do to obtain the answer. If you encounter any more issues feel free to ask.
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