Free Fallin The acceleration due to gravity (g = -10 m/s^2)
Scenario: We dropped a ball off the top of Hoover Stadium yesterday. The time
for the ball to drop was 15 seconds. Answer the following questions.
1. What was the final velocity of the ball at 15 sec.?
the final velocity was 7 m/sec
2. What was the average velocity of the ball as it fell?
0+10=10/2=5
5 m/s
3. What was the total distance the ball travelled?
As far as it could go, because it rolled with its potential energy, dropping to
kinetic energy
4. What was the velocity of the ball at 10 seconds?

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?