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  1. M

    Please help bh curve - hysterisis

    http://www.answers.com/topic/b-h-curve?cat=technology (electromagnetism) A graphical curve showing the relation between magnetic induction B and magnetizing force H for a magnetic material. Also known as magnetization curve. Just google it...
  2. M

    Tabletop to Floor, find Time

    For (a) all you need to know is how long the ball was in the air. Consider the ball along the y direction only. What is the inital velocity, displacement and acceleration? Stick thoose values into an equation of motion to find the value of time. For (b) once you know the time the ball is in...
  3. M

    Constant Acceleration Question

    Actually wait a minute ignore what i said. I assumed because you assumed the equation would be quadratic that it would be... if that makes any sense? You want an equation of speed vs time so you want time and speed to remain as symbols t and v.
  4. M

    Constant Acceleration Question

    Yeah that looks good. It asks you for a quadratic equation and the only equation of motion that contains a square of t is : s = ut + 0.5at^2
  5. M

    Constant Acceleration Question

    Yes all is correct expect your equation it's : v^2 = u^2 + 2as or as you would write Vf^2 = Vi^2 + 2ad I think you are confused, we are talking about only the first half of the journey, from the ground to the point where the object is at the point of coming back down (Has zero...
  6. M

    Constant Acceleration Question

    Ummm... Just a little out, that's over half the speed of light. You were correct to disregard the mass. Firstly i would suggest writing down all the information you know. Acceleration : Displacement: Initial Velocity: Time: End...
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