Recent content by whoopie88

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    Rotational Kinematics Time Problem

    Can somebody please help me? I need this answer turned in by 11:59pm tonight! D:
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    Rotational Kinematics Time Problem

    Homework Statement A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -4.40 rad/s^2. Because of this acceleration, the angular velocity of the wheel changes from its initial value to a final value of -24.0...
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    Difficult Ladder Against Wall Torque Problem

    That information is not given. Here is the diagram that goes along with the problem:
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    Difficult Ladder Against Wall Torque Problem

    That is what I was looking for, but that's an incorrect answer.
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    Difficult Ladder Against Wall Torque Problem

    No; I wasn't given the coefficient of friction. My instructor, for all of our problems relating to torque, has made it clear that we do not need to apply f = μN.
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    Difficult Ladder Against Wall Torque Problem

    Difficult Ladder Against Wall Torque Problem! Homework Statement An 85 kg person stands on a uniform 6.6 kg ladder that is 3.9 m long, as shown. The floor is rough; hence it exerts both a normal force, f1, and a frictional force, f2, on the ladder. The wall, on the other hand, is...
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    Kinematics / Forces Friction Problem?

    Okay, thanks! That helped a bunch! I got the answer!
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    Kinematics / Forces Friction Problem?

    Homework Statement A baseball player slides into third base with an initial speed of 7.00 m/s. If the coefficient of kinetic friction between the player and the ground is 0.37, how far does the player slide before coming to rest? Homework Equations All Kinematics and Forces Equations...
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    What is the Required Horizontal Force for a Shopping Cart on an Inclined Plane?

    Ohhh, thank you, I got the answer!
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    Tension, Angles, Forces Problem

    Homework Statement Two crewmen pull a boat through a lock, as shown in Figure 5-25. One crewman pulls with a force of F1 = 115 N at an angle of θ = 36° relative to the forward direction of the raft. The second crewman, on the opposite side of the lock, pulls at an angle of 45°. With what force...
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    What is the Required Horizontal Force for a Shopping Cart on an Inclined Plane?

    Homework Statement A shopper pushes a 7.3 kg shopping cart up a 13° incline, as shown in Figure 5-24. Find the magnitude of the horizontal force, F, needed to give the cart an acceleration of 1.67 m/s2. Figure 5-24 Homework Equations All forces equations. The Attempt at a...
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    Second Derivative in Terms of Y

    Homework Statement Find the second derivative of 4x^2 + 3x - 9y^2. Answer in terms of y. Homework Equations All derivative formulas. The Attempt at a Solution [PLAIN]http://http://i52.tinypic.com/2w2ptex.jpg I can't get much further than this; the thing that gets me is how to put...
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    2D Kinematics - Finding Initial Velocity

    Oh, no I don't. Okay, thank you. I found the correct solution. Thank you!
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    2D Kinematics - Finding Initial Velocity

    How can I deduce the time it takes to reach the maximum height? Is that just half of the hang time?
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    2D Kinematics - Finding Initial Velocity

    Homework Statement The "hang time" of a punt is measured to be 3.50 s. If the ball was kicked at an angle of 69.0° above the horizontal and was caught at the same level from which it was kicked, what was its initial speed? (Neglect air resistance.) Homework Equations All Kinematics...