a professional baseball pitcher throws a 0.145 kg baseball with a velocity of 40 m/s (N). the ball is batted to the pitch with a velocity of 49 m/s (S). what is the magnitude of the change in ball's momentum? a. 1.305 kg.m/s b. 1.3 kg.m/s c. 12.905 kg.m/s d. 13 kg.m/s a billiard ball collided with with a second incident ball in an elastic head on collision. what is the kinetic energy of the system after the collision compared with the kinetic energy before the collision? a. unchanged b. 2x as great c. 4x as great d. 1/4 as great an egg dropped on the road usually breaks, while one dropped on the grass usually does not. the egg doesn't break when dropped on the grass because: a. the time interval for stopping is greater b. the time interval for stopping is less c. the impulse is greater d. the impulse is less 2 point charged produce an electrostatic force of 6.87 . 10^-3 N. determine if he electrostatic force produced if charge 1 is doubled, charge 2 is tripled and the distance between them is reduced by half. a. 1.65 . 10^-1 N b. 6.87 . 10^-3 N c. 4.12 . 10^-2 N d. 2.06 . 10^-2 N