ACT 3: DISTANCE/DISP/VELOCITY/ACCELERATION 1. A bicycle travels 12 km in 40 min. What is its average speed? Express your answer in m/s. 2. If a person can run a distance of 20km in three hours, what is the person's velocity? Express your answer in m/s. 3. A ball rolling at a rate of 2km/hr was brought to stop in 10 seconds. Find its acceleration. Express your answer in m/s2.

ACT 4: UNIFORM MOTION 1. A car and a truck are each traveling at 70 ft/s, and the car is 75 ft. behind the truck. The car driver decides to pass the truck, and he steps on the gas, producing an acceleration of 6 ft/s2. a. How long will it be before the car is alongside the truck? b. How fast will the car be moving relative to the truck when they are side by side?

2. The human body can survive an acceleration trauma incident (sudden stop) if the magnitude of the acceleration is less than 2.5m/s2. If you are in an automobile accident with an initial speed of 105km/h and you are stopped by an airbag that inflates from the dashboard, over what distance must the airbag stop you for you to survive the crash?

ACT 5: FREE FALL MOTION

-Michael Jordan was said to have a hang-time of 3.0 seconds (at least according to a popular NIKE commercial). Determine the height to which MJ could leap if he was wearing NIKE shoes and had a hang-time of 3.0 seconds.

-A marble dropped from a bridge strikes the water in 2 seconds. What is the speed (vfy) just before it hits the water? What is the height of the bridge?