Problems
3.1 Acceleration
The driver of a sports car traveling at 10.0 m/s steps down hard on the accelerator for 5.0 s and the velocity increases to 30.0 m/s. What was the average acceleration of the car during the 5.0 s time interval?
 â€“1.0 Ã— 10^{2} m/s^{2}
 â€“4.0 m/s^{2}
 4.0 m/s^{2}
 1.0 Ã— 10^{2} m/s^{2}
A girl rolls a basketball across a basketball court. The ball slowly decelerates at a rate of âˆ’0.20 m/s^{2}. If the initial velocity was 2.0 m/s and the ball rolled to a stop at 5.0 sec after 12:00 p.m., at what time did she start the ball rolling?
 0.1 seconds before noon
 0.1 seconds after noon
 5 seconds before noon
 5 seconds after noon
3.2 Representing Acceleration with Equations and Graphs
A swan on a lake gets airborne by flapping its wings and running on top of the water. If the swan must reach a velocity of 6.00 m/s to take off and it accelerates from rest at a constant rate of 0.350 m/s^{2}, how far will it travel before becoming airborne?
 âˆ’8.60 m
 8.60 m
 âˆ’51.4 m
 51.4 m

0.408\,\text{s}

0.816\,\text{s}

1.34\,\text{s}

1.75\,\text{s}

1.28 s