BackA cat walks in a straight line, which we shall call the -axis, with the positive direction to the right. As an observant physicist, you make measurements of this cat's motion and construct a graph of the feline's velocity as a function of time (Fig. E). What distance does the cat move during the first s? From to s?
The table shows test data for the Bugatti Veyron Super Sport, the fastest street car made. The car is moving in a straight line (the -axis).
(a) Sketch a - graph of this car's velocity (in mi/h) as a function of time. Is its acceleration constant?
(b) Calculate the car's average acceleration (in m/s2) between (i) and s; (ii) s and s; (iii) s and s. Are these results consistent with your graph in part (a)? (Before you decide to buy this car, it might be helpful to know that only will be built, it runs out of gas in minutes at top speed, and it costs more than million!)
High-speed motion pictures ( frames/second) of a jumping, flea yielded the data used to plot the graph in Fig. E. (See 'The Flying Leap of the Flea' by M. Rothschild, Y. Schlein, K. Parker, C. Neville, and S. Sternberg in the November Scientific American.) This flea was about mm long and jumped at a nearly vertical takeoff angle. Use the graph to answer this question: Is the acceleration of the flea ever zero? If so, when? Justify your answer.
On a graph, which of the following best represents an object moving with negative velocity?
A car's motion is represented by the following velocity-time graph: from to , velocity increases linearly from to ; from to , velocity remains at ; from to , velocity decreases linearly to . During which segment(s) is the velocity constant?
Given a vs. graph that shows a straight line with a constant positive slope, which of the following vs. graphs correctly represents the motion?
Given that (figure 1) shows the -versus- graph for an object moving along the -axis, which of the following statements is correct about the object's acceleration during the time interval where the graph is a straight line with a positive slope?
On a graph, which feature indicates that an object is accelerating?
If a car needs to cross a two-lane roadway where the traffic is moving at , approximately how long of a time gap is required for the car to safely cross?
A car increases its speed and then decreases its speed over time. Which of the following tables could represent the speed of the car () at equal time intervals?
On a position-versus-time graph for an object, what does the at a given point represent?
Which of the following graphs represents an object moving at constant speed?
Given a -time graph where increases linearly with , what does the slope of the graph represent?
On a graph, which type of gradient indicates that an object is moving with constant velocity?
Two cars, Car A and Car B, start from rest at the same time. Car A moves with a constant velocity of , while Car B starts from rest and accelerates uniformly at . If the finish line is away from the starting point, which car crosses the finish line first?