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  1. A

    Electric Field for the circular path of a positively charged particle

    Here is picture. Answers is A. My attempt was that I thought if i were to place a positive test charge then it would go from top to bottom if there was a positive charge in the center it was avoiding and a positively charged particle at the top, but an electron at the bottom so it would avoid...
  2. A

    Some motion graph questions

    1. Homework Statement picture 1: picture 2: 2. Homework Equations 3. The Attempt at a Solution For the first picture I was thinking answer B because at the start velocity increases, but as terminal velocity is hit the velocity doesn't increase as much.. why is it graph A? For the...
  3. A

    Speed of ball vs Acceleration of the ball?

    1. Homework Statement 2. Homework Equations v = s/t a = v/t 3. The Attempt at a Solution My thinking was that through this small distance of air since velocity would increase due to the change in position changing at an increasing rate and thus since velocity is increasing then...
  4. A

    Why is the work zero here?

    1. Homework Statement Is the work zero here because its a frictionless surface? If, so why? If not then whats the reason and why? 2. Homework Equations 3. The Attempt at a Solution I was originally thinking 1/2mv^2 .. but KE is zero right, but having it be mgh didn't make sense..
  5. A

    Efficiency of an Electric motor pulling a truck up an inclined plane

    1. Homework Statement See picture. 2. Homework Equations 3. The Attempt at a Solution I tried at first just doing (1/3)*(48kJ) to get the energy dissipated, but that would i=give me 16kJ