If two point charges are separated by 1.5 cm and have charge values of 2.0 C and 4.0 C, respectively, what is the value of the mutual force between them? 32000 N
3.6 x10–8 N
8.0 x10–12
320 N
3.1 x10–3 N

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?

Is the vertical component of velocity ever zero?

Check the following equation for dimensional homogeneity: ⅆ mv=∫t1t2(f⁢cosθ)ⅆt where m is mass, v is velocity, f is force, θ is an angle, and t is time. check that each term in the equation has the following dimensions: [malbec] where you are to choose the coefficients a, b, c.