Recent content by Xisune

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    Basic Avg Speed/Constant Acceleration train question

    ii) Asks you to find the instantaneous velocity at 2 minutes, whereas i) asks you to find the average velocity during the 2 minutes.
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    Find velocity of hanging block in a pulley system

    You only need to solve the first equation, W is the work done by friction, and the system would gain kinetic energy but lose gravitational potential energy.
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    Why Does Oil on Water Create Rainbow Colors?

    Since the index of refraction of oil is less than water in this case, what must the path difference be for constructive interference?
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    How Many Electrons are Needed to Create a Force of 10^-19 N Between Two Spheres?

    Your answer is correct, 25 electrons does not give 10^-19 N.
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    Calculating temperature with energy absorbed

    Yes, now use that value for Q.
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    Calculating temperature with energy absorbed

    If the pitchers absorb 1000J of energy in 10 minutes, how much energy will they absorb in 1 hour?
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    What happens in a short circuit situation (parallel)?

    The 4-ohm resistor short circuits, thus making its resistance zero, from ohm's law. I = v/r, since r is 0, I is infinity.
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    Mass collides with spring and mass

    Try conservation of momentum.
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    Calculating the loss in mechanical energy due to a collision

    What is the energy before the collision? and after the collision?
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    Fields and Schwartzchild radius for a black hole

    Your formula is incorrect, V2 = (2GM)/r.
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    How Does Friction Affect Falling Objects?

    W = F x d, you know what d is.
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    How Does Friction Affect Falling Objects?

    W = ΔEk + ΔEp W is work due to friction. ΔEk is the change in kinetic energy. ΔEp is the change in gravitational potential energy. In this case, the hat gains kinetic energy but loses potential energy, so ΔEk is positive, and ΔEp is negative.
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    How Does Friction Affect Falling Objects?

    Use the work energy theorem.
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    Solve Jumper Question Homework: Part A & B with Initial Speed & Force

    The force the ground exerts on the person is going to last 41 cm, the initial velocity would be 0, the final velocity would be the answer to part a, from there you can solve for acceleration.
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    Projectile motion question ( basketball being thrown into a hoop)

    0.9m is not maximum height, so u^2 is not 17.64, but you don't need to find max height anyways. Start with the displacement equations for both components, then put those equations together to find time.
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