prediction 2-1: Suppose you grasp the screw eye, give the IOLab a short pull to the right (positive direction) and release it. describe in words the force vs time graph   prediction 2-2: describe the velocity and acceleration vs time graphs.

Fill in the blanks of this little story with the names of the appropriate elements BeSTe OF LuCK In YOURe SeArCH! "The poor fellow crashed his (Ag)__________________________ (Ne)_____________________________ into a wall. Luckily, a good (Sm) ____________________________ came along and tried to (He)______________________________________, but, alas, it was too late. All the hapless rescuer could do was (Ba)_____________________in a (Kr)_____________________the hill nearby."

You are at a red light in your car. The red light turns green, and you take your foot off the brake and step on the gas pedal, without turning the steering wheel. The speedometer changes from 0 to 20 mph in 3 seconds. In those 3 seconds, did the car change velocity? Is that an acceleration? Now, at a constant speed of 20 mph, you make a right turn. Is that an acceleration?

An elephant is located on Earth’s surface at a latitude . Calculate the centripetal acceleration of the elephant resulting from the rotation of Earth around is polar axis. Express your answer in terms of , the radius REof Earth and time T for one rotation of Earth. Compare your answer with g for =40 .

Many historians suspect that Galileo offended Pope Urban VIII by putting the pope’s favorite argument into the mouth of Simplicio. How is the pope’s argument a challenge to the principle of cause and effect?

To what extent was Aristotle’s model of falling bodies correct? How was it wrong?

(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) A woman is riding on a train while watching the display on her GPS unit. She notices that both the speed’ and the “speed” readings are not changing. What can the stir conclude about the net force acting on the train car?

Try the following experiment away from traffic: where you can do it Safely. With the car VOU are driving moving slowly on a Straight, level road, shift the transmission into neutral and let the car coast. At the moment the car comes to a complete slop, step hard on the ln.ike and notice what you feel. Now repeal I he same experiment on a fairly gentle, uphill slope. Explain the difference in what a pet son tiding in the car feels in the two cases. (Brian Popp suggested the idea for this question.)

According to Keplers first law, planets move in elliptical orbits. Why is that considered accelerated motion? According to Newton, what is the force causing that acceleration?

Because Newtons first law is counterintuitive, it is important to take some time to think about what the law says and about how and why it differs from our intuition. a. Why did the unavoidable presence of friction make it difficult for earlier scientists to come to the conclusion expressed in Newtons first law? b. What is the natural state of an object? c. How much force does it take to keep an object moving at constant velocity?