14:10Average velocity for constant acceleration | One-dimensional motion | Physics | Khan AcademyKhan Academy546views
Textbook QuestionHigh-speed motion pictures (3500 frames/second) of a jumping, 210–μg flea yielded the data used to plot the graph in Fig. E2.54. (See 'The Flying Leap of the Flea' by M. Rothschild, Y. Schlein, K. Parker, C. Neville, and S. Sternberg in the November 1973 Scientific American.) This flea was about 2 mm long and jumped at a nearly vertical takeoff angle. Use the graph to answer these questions: (c) Find the flea's acceleration at 0.5 ms, 1.0 ms, and 1.5 ms. 574views
Textbook QuestionHigh-speed motion pictures (3500 frames/second) of a jumping, 210–μg flea yielded the data used to plot the graph in Fig. E2.54. (See 'The Flying Leap of the Flea' by M. Rothschild, Y. Schlein, K. Parker, C. Neville, and S. Sternberg in the November 1973 Scientific American.) This flea was about 2 mm long and jumped at a nearly vertical takeoff angle. Use the graph to answer these questions: (b) Find the maximum height the flea reached in the first 2.5 ms. 726views
Textbook QuestionHigh-speed motion pictures (3500 frames/second) of a jumping, 210–μg flea yielded the data used to plot the graph in Fig. E2.54. (See 'The Flying Leap of the Flea' by M. Rothschild, Y. Schlein, K. Parker, C. Neville, and S. Sternberg in the November 1973 Scientific American.) This flea was about 2 mm long and jumped at a nearly vertical takeoff angle. Use the graph to answer these questions: (a) Is the acceleration of the flea ever zero? If so, when? Justify your answer. 664views
Textbook QuestionThe Fastest (and Most Expensive) Car! 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 x-axis). (a) Sketch a vx–t 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) 0 and 2.1 s; (ii) 2.1 s and 20.0 s; (iii) 20.0 s and 53 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 300 will be built, it runs out of gas in 12 minutes at top speed, and it costs more than $1.5 million!)758views
Textbook QuestionA cat walks in a straight line, which we shall call the x-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. E2.30). (c) What distance does the cat move during the first 4.5 s? From t = 0 to t = 7.5 s? 827views
Textbook QuestionA cat walks in a straight line, which we shall call the x-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. E2.30). (b) What is the cat's acceleration at t = 3.0 s? At t = 6.0 s? At t = 7.0 s? 1000views
Textbook QuestionA ball moves in a straight line (the x-axis). The graph in Fig. E2.9 shows this ball's velocity as a function of time. (a) What are the ball's average speed and average velocity during the first 3.0 s? 3058views2rank
Textbook QuestionFIGURE EX2.8 showed the velocity graph of blood in the aorta. What is the blood's acceleration during each phase of the motion, speeding up and slowing down?374views
Textbook QuestionFIGURE EX2.9 shows the velocity graph of a particle. Draw the particle's acceleration graph for the interval . 398views
Textbook QuestionFIGURE EX2.12 shows the velocity-versus-time graph for a particle moving along the x-axis. Its initial position is at x0 = 2m at t0 = 0s (b) What are the particle's position, velocity, and acceleration at t = 3.0s 503views
Textbook QuestionFIGURE EX2.12 shows the velocity-versus-time graph for a particle moving along the x-axis. Its initial position is at x0 = 2m at t0 = 0s (a) What are the particle's position, velocity, and acceleration at t = 1.0s 446views
Textbook QuestionFIGURE EX2.32 shows the acceleration graph for a particle that starts from rest at t = 0 s. What is the particle's velocity at t = 6 s? 442views
Textbook Question(II) Figure 2–42 shows the velocity of a train as a function of time.(a) At what time was its velocity greatest?<IMAGE>311views
Textbook Question(II) A sports car accelerates approximately as shown in the velocity–time graph of Fig. 2–43. (The short flat spots in the curve represent manual shifting of the gears.) Estimate the car's average acceleration in(a) second gear and (b) fourth gear. <IMAGE>335views
Textbook Question(II) Given v(t) = 25 + 18t, where v is in m/s and t is in s, use calculus to determine the total displacement from t₁ = 1.3 s to t₂ = 3.6 s.290views
Textbook Question(II) Figure 2–42 shows the velocity of a train as a function of time.(b) During what periods, if any, was the velocity constant?<IMAGE>269views
Textbook Question(II) Figure 2–42 shows the velocity of a train as a function of time.(c) During what periods, if any, was the acceleration constant?<IMAGE>462views
Textbook Question(II) Figure 2–42 shows the velocity of a train as a function of time.(d) When was the magnitude of the acceleration greatest?<IMAGE>266views