Q. Two equally charged, 1.00 g} spheres are placed with 2.00 {cm} between their centers. When released, each begins to accelerate at 225 {m/s^2}. What is the magnitude of the charge on each sphere?
Q. A 1000kg experimental rocket sled on a level frictionless rail is loaded wiht 50 kg of propellant. It exhausts the propellant in a 20-s "burn". If the rocket, initially at rest, moves at 150 m/s after the burn, what impulse is experienced by the rocket sled?