if the inclined plane has coefficient of friction, μ = 0.3, then 0.2 kg mass will move down with an acceleration (a) 0.2 m/s2 (b) 0.4 m/s2 (c) 2.4 m/s2 (d) 0.8 m/s2

What is the electric force acting between two charges of -0.0045 c and -0.0025 c that are 0.0060 m apart? use fe=kq1q2/r^2 and k = 9.00 x 10^9 n*m^2/c^2 a. 1.7 x 10^7 n b. -1.7 x 10^7 n c. -2.8 x 10^9 n d. 2.8 x 10^9 n