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  1. #1 help help help 
    Forum Freshman almirza's Avatar
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    hi friends
    I have some questions which i could not answer . Will u help me to answer them??????

    1) A body is projected horizontally from ground level with a speed of 24 m/s at an angle of 30 above the horizontal. Neglect air resistance and calculate:
    (A) the verticle resolved part of its velocity.
    (B) the time taken to reach its highest point.
    (C)the greatest height reached.
    (D) the horizontal range of the body.


    2)A ladder of mass 15.0 kg leans with its upper end against a frictionless wall .
    There are some questions which i can answer them but one which is:
    (A) calculatei) the total push of the ground on the bottom of the ladder (ii) the angle which this force makes with the vertical.
    ( u have to draw a body force diagrame)


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  3. #2  
    JS
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    Nobody here is going to do your homework, pal.

    I'd be most happy to go over your calculations and provide you hints, but walkthroughs is a strict no-no. That's what examples are for.


    And God said: Div(E) = \rho / \epsilon_0, Curl(E) = - \partial(B,t), Div(B) = 0, Curl(B) = \mu_0 (j + \epsilon_0 \partial(E,t)). And there was light.

    [...]

    And thus God sent forth Man from the Garden of Eden after a heated discussion of dresscodes and eating habits.
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  4. #3  
    Forum Freshman almirza's Avatar
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    This is not my homework i am just preparing for exams and i tried to solve these questions from a physics source but i couldn't..........
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  5. #4  
    JS
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    Quote Originally Posted by almirza
    This is not my homework i am just preparing for exams and i tried to solve these questions from a physics source but i couldn't..........
    Oh. Then you're probably screwed.

    1) Remember that position, velocity, and acceleration are vector quantities. Remember you trigonometric relations. Remember the relationship between acceleration and velocity and velocity and position. Remember that gravity near the surface of the Earth is a uniform field of strength g.

    2) Remember that for an immobile object, both torque and net force must be exactly zero (no matter which point you use as a reference for your torque). Further remember that forces engaging in a given point do not contribute to the torque about that point.
    And God said: Div(E) = \rho / \epsilon_0, Curl(E) = - \partial(B,t), Div(B) = 0, Curl(B) = \mu_0 (j + \epsilon_0 \partial(E,t)). And there was light.

    [...]

    And thus God sent forth Man from the Garden of Eden after a heated discussion of dresscodes and eating habits.
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