Net force Definition and 508 Threads

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  1. C

    Newton's Laws and Net Force: Checking My Understanding

    please help me check my answers, cause if i get one answer wrong, it's a big point deduction. i don't really like doing my homework online. here it goes... 1.) An object cannot remain at rest unless which of the following holds? A.)The net force acting on it is zero. B.) The net...
  2. P

    Calculating Net Force: Equilateral Triangle with Point Charges

    Hi, Can anybody help me get started on this problem? Point P2 is located 3.0 m away from each -Q (-Q = -40 nC) , forming an equilateral triangle with them. Determine the net force (magnitude and direction) that would act on a small charge of +1.0 nC placed at P2. Any hints? Thanks!
  3. G

    How can you determine the net force of a bottle

    How can you determine the net force of a bottle who's contents are kept under 2 atm of pressure, and it has a 1 cm opening for example? a1v1=a2v2 doesn't seem to apply, and the flowrate=dav doesn't seem to either. I suspect it is bernoulli's equation, but I am unsure. I know P=F/A, but how...
  4. B

    Net Force on q5: Magnitude & Direction

    assume the charges 1-4 are fized ( q1=+3uC, q2=+4uC, q3=-3, q4=-4) Find the net force felt by charge 5 (q5=-2uC) both magnitude and direction. I'm not sure wut equation to use?
  5. 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...
  6. 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 = -(...
  7. 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...
  8. 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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