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  1. Q

    Force needed to pull out a plug out of a drain under water?

    Homework Statement The plug for the drain of a water tower is located 3.0 m below the surface. The plug is circular and has a diameter of 5.0 cm. If the density of water is 1000 kg/m3 , how much force is required to remove the plug (you may ignore the weight of the plug itself) Homework...
  2. Q

    Predicting Position for velocity time graph

    Homework Statement Homework Equations The Attempt at a Solution I honestly have no clue as to how to go about this question. Am i supposed to find the area under the curve? but how do i do that without y axis numbers. am i supposed to look at the slopes?
  3. Q

    Curves on a Position time graph

    Homework Statement Homework Equations The Attempt at a Solution I knew the answer was between A and B, but the inward curves and outward curves on the position time graph confused me , what exactly does it mean? -does A have an increasing velocity and then B has a decreasing velocity? im...
  4. Q

    How to calculate average velocity given distance and time?

    Homework Statement A motorist drives north for 35.9min at 73.3km/hr and then stops for 15.4min. He then continues north, traveling 114.5km in 1.93hr. What is his average velocity? Homework Equations avg velocity = xf - xi / time The Attempt at a Solution 35.9 min * (1 hr / 60 min) = 0.5983...
  5. Q

    Find the tension in the rope pulling a box at an angle

    Homework Statement Homework Equations The Attempt at a Solution Here is what i have done so far: Fx = cos 45 T - Ff =ma Fy=sin 45 T -mg+ Fn =ma I found ff= uk * Fn = 0.5 *sin 45 +mg fn = sin 45 +mg Isolated for T in the x and y: Tx = ma + Ff / cos 45 = 13.404 Ty = ma +mg - Fn / sin 45...
  6. Q

    Conservation of Momentum Spaceship Question

    Homework Statement The mass of a spaceship is 10012 kg. The spaceship is at rest. Then one part of the ship with a mass of 1000 kg is ejected and emerges with a speed of 112 m/s. What is the speed of the other part? Homework Equations The Attempt at a Solution I tried: pi=pf mivi=mfv2...
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