Net force Definition and 504 Threads

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  1. holly

    What is the Net Force on a Rock Thrown Vertically Into the Air?

    The Question: If a rock is thrown vertically into the air, at the very top of its trajectory the net force on it is: a) its weight b)less than its weight c)more than its weight. I think it is c, More than its weight, because it has its weight plus the 9.81 bearing down on it. Study group...
  2. K

    Solving for Net Force of Charge Q on Two Charges q1 & q2

    Hello all, I have two charges, q1 & q2, along a horizontal axis of length L. I supposed to determine the length at which another charge, Q, can be placed so that its net force is zero, other than infinitely away. I'm using the equation: F = kq1Q / r + kq2Q / r -- > kq1Q / (L+x)^2 = -(...
  3. S

    What is the correct net force needed to increase a car's velocity in 30 seconds?

    I'm doing some problems I found here: http://library.thinkquest.org/10796/ch4/ch4q.htm A car is moving at a constant velocity of 20 km/h (5.56 m/s). How much net force is required to raise its velocity to 50 km/h (13.89 m/s) in 30 seconds? Suppose the car has a mass of 150 kg. I used...
  4. E

    Is 100N the Correct Calculation for Net Force Given These Directions?

    the below forces act on an object; 10N north; 50 N south, and 40N west. what is themagnitude of the net force? my answer is 100 n is that correct?
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