Quiz Friday - practice problems here

1.  A ball is dropped from rest from atop a 60-m tall tower.  If it undergoes a standard acceleration due to gravity of  9.8 m/s/s, find the following:

a.  how long it takes to hit the ground

b.  the speed it will have right before it hits the ground

2.  A car is traveling at 30 m/s when the driver applies the brakes, bringing the car to a halt in 3 seconds.  Find:

a.  the acceleration during this braking period

b.  how far the car travels during this period