A 5-kg cart moving to the right witha speed of 6 m/s collideswitha concrete wall and rebounds with a speed of 2 m/s. Is thechange in momentum of the cart (a) 0,
(b) 40 kg * m/s,
(c) -40kg*m/s,
(d) -30 kg*m/s,
(e) -10 kg*m/s

When you turn on a battery-operated device, an electrical circuit is

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?