car in stop-and-go traffic starts at rest, moves forward 21 m in 8.0 s, en comes to rest again. The velocity-versus-time plot for this car is ren in the figure(Figure 1). What distance does the car cover in the first 4.0 seconds of its motion? Express your answer using two significant figures. d = m Submit Request Answer • Part B What distance does the car cover in the last 2.0 seconds of its motion? Express your answer using two significant figures. VOJAE ure < 1 of 1 Submit Request Answer • Part C What is the constant speed V that characterizes the middle portion of its motion? Express your answer using two significant figures. + ΑΣφ- ?

car in stop-and-go traffic starts at rest, moves forward 21 m in 8.0 s, en comes to rest again. The velocity-versus-time plot for this car is ren in the figure(Figure 1). What distance does the car cover in the first 4.0 seconds of its motion? Express your answer using two significant figures. d = m Submit Request Answer • Part B What distance does the car cover in the last 2.0 seconds of its motion? Express your answer using two significant figures. VOJAE ure < 1 of 1 Submit Request Answer • Part C What is the constant speed V that characterizes the middle portion of its motion? Express your answer using two significant figures. + ΑΣφ- ?

Name: Part AA car in stop-and-go traffic starts at rest, moves forward 21 m
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Description: Part AA car in stop-and-go traffic starts at rest, moves forward 21 m in 8.0 s,then comes to rest again. The velocity-versus-time plot for this car isgiven in the figure(Figure 1).What distance does the car cover in the first 4.0 seconds of its moti

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter2: Kinematics

Section: Chapter Questions

Problem 38PE: A bicycle racer sprints at the end of a race to clinch a victory. The racer has an initial velocity...

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A student drives a moped along a straight road as described by the velocity-versus-time graph in Figure P2.12. Sketch this graph in the middle of a sheet of graph paper. (a) Directly above your graph, sketch a graph of the position versus time, aligning the time coordinates of the two graphs. (b) Sketch a graph of the acceleration versus time directly below the velocity-versus-time graph, again aligning the time coordinates. On each graph, show the numerical values of x and ax for all points of inflection. (c) What is the acceleration at t = 6.00 s? (d) Find the position (relative to the starting point) at t = 6.00 s. (e) What is the mopeds final position at t = 9.00 s? Figure P2.12
After a long and grueling race, two cadets, A and B, are coming into the finish line at the Marine Corps marathon. They move in the same direction along a straight path; the position-versus-time graphs for the runners are shown in Figure P2.7 for a minute near the end of the race. a. At time t1 is the speed of cadet B greater than, less than, or equal to the speed of cadet A? b. At time t2, is cadet B speeding up, slowing down, or moving with constant speed? c. From time t = 0 to time t = 60 s, is the average speed of cadet B greater than, less than, or equal to the average speed of cadet A? Explain.
Case Study Crall and Whipple attached a fan to a cart placed on a level track and then released the cart. They made a position-versus-time graph (Fig. P2.54) and fit a curve to these data such that x=0.036m+(0.0080m/s)t+(0.10m/s2)t2 a. Find and graph the velocity as a function of time. b. What is the shape of the velocity-versus-time graph? What do you expect the acceleration-versus-time graph to look like? Explain. c. Find and graph the acceleration as a function of time.
(a) Sketch a graph of velocity versus time corresponding to the graph of displacement versus time given in the following figure. (b) Identify the time or times (ta,tb,tcetc.) at which the instantaneous velocity has the greatest positive value. (c) At which times is it zero? (d) At which times is it negative?
A bicycle racer sprints at the end of a race to clinch a victory. The racer has an initial velocity of 11.5 m/s and accelerates at the rate of 0.500 m/s2 for 7.00 s. (a) What is his final velocity? (b) The racer continues at this velocity to the finish line. If he was 300 m from the finish line when he started to accelerate, how much time did he save? (c) One other racer was 5.00 m ahead when the winner started to accelerate, but he was unable to accelerate, and traveled at 11.8 m/s until the finish line. How far ahead of him (in meters and in seconds) did the winner finish?
A woman backs her van out of her parking space with a constant acceleration of 1.8 m/s2. Assume that her initial motion is in the positive direction. Part A: How long does it take her to reach a speed of 2.1 m/s in seconds? Part B: If she then brakes to a stop in 0.65 s, what is her acceleration in meters per square second?
Q1. You drive a beat-up pickup truck along straight road for 8.4 km at 70 km/h, at which point the truck runs out of gasoline and stops. Over the next 30 min, you walk another 2.0 km farther along the road to a gasoline station. What is your average velocity from the beginning of your drive to your arrival at the gasoline station?
A car in stop-and-go traffic starts at rest, moves forward 20 mm in 8.0 ss, then comes to rest again. The velocity-versus-time plot for this car is given in the figure(Figure 1). What distance does the car cover in the first 4.0 seconds of its motion? What distance does the car cover in the last 2.0 seconds of its motion? What is the constant speed V that characterizes the middle portion of its motion?
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1.Leo traveled 25.0km from their house to a shopping mall to meet a friend .Upon reaching the mall,texted that he cannot come. Sadly,Leo went back home following the same path.(a)What was the total distance leo traveled?(b)what was his displacement?If the entire trip look Leo 0.75h,what were his (c) average speed and(d) average velocity?
MT2: Match the given position vs time graph to the correct velocity vs time graph that represents the same motion. Don’t worry about matching exact times, just look for the right pattern.In a couple sentences or bullet points, describe a physical scenario for the motion (for example, using the motion of a person walking or a car driving).