What should be the spring constant k of a spring designed to bring a 1200-kg car to rest from a speed of 94 km/h so that the occupants undergo a maximum acceleration of 4. 0g?.

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

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Which situation will produce the greatest change of momentum