Recent content by Sally99

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    Conservation of Momentum and Kinetic Energy in Outer Space Collisions

    Ohhh ok thankyou very much! So what you're basically saying is that the kinetic energy is nonzero?
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    Conservation of Momentum and Kinetic Energy in Outer Space Collisions

    Oh, I see that makes sense. How come we couldn't assume that the collision was elastic? And since it is in space where there is no gravity, does it affect the collision?
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    Conservation of Momentum and Kinetic Energy in Outer Space Collisions

    Are the answers I made earlier today correct? I can't seem to find the logic behind them. Would anyone please be willing to elaborate?
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    Conservation of Momentum and Kinetic Energy in Outer Space Collisions

    Ok so I'm a little confused here a) Momentum is not conserved for the single object. b) The momentum of both are conserved because their sum equals zero. c) Since it is an elastic collision, the kinetic energy can not be zero because the space ships don't stick together? Do we have to factor...
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    Solving a 2D inelastic collision involving cars and tricycles

    Ahhhh ok I see, thanks so much for your input!
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    Calculating Spring Constant for Large Springs and Trampolines

    Ok that's what I did, thanks for your help guys!
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    Calculating Spring Constant for Large Springs and Trampolines

    The velocity in this question is only meant for part b) though.
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    Solving a 2D inelastic collision involving cars and tricycles

    If I solved it using relative velocities would it give an incorrect answer?
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    Solving a 2D inelastic collision involving cars and tricycles

    Ok so i noticed no one is replying to my thread so I'm going to elaborate a little. to solve for initial velocity of car 2 i wrote V21 = v2g - v1g (-7.5, 13.0) = v2g - (0, 20) v2g = (-7.5, -7) Then to find the final velocity i did m1v1 + m2v2 = (m1 + m2) v2 (40)(0,20) + (50)(-7.5,-7) = 90v2...
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    Calculating Spring Constant for Large Springs and Trampolines

    Yeah and thanks for the reply! I actually used that equation for part b). But if i did use the conservation of energy principle wouldn't I need to be given velocity?
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    Conservation of Momentum and Kinetic Energy in Outer Space Collisions

    No. Rowie does physics questions allllll night every night.
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    Solving a 2D inelastic collision involving cars and tricycles

    Homework Statement You are moving due North in your car with velocity (0, 20m/s). You see another car traveling with a relative velocity of 15 m/s with an angle of 150 degrees. You have a mass of 30 kg, the other tricyclist has a mass of 40kg and the tricycles both have mass 10kg. You...
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    Calculating Spring Constant for Large Springs and Trampolines

    Homework Statement You are making a large spring. You want a 150kg person to be able to stand on the spring an be above or just touch the ground which is 15 cm below. a) What is the minimum spring constant the large spring should have? b) From the above value, if you have a mass of 70kg...