A small object carrying a charge of -7.00 nC is acted upon by a downward force of 23.0 nN when placed at a certain point in an electric field. A. What are the magnitude and direction of the electric field at the point in question?
B. What would be the magnitude and direction of the force acting on a proton placed at this same point in the electric field?

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four

How can you increase the strength of an electromagnet?