Part A Select the correct "story" about a real object that has the motion diagram shown in the figure. O A car coasts along at 30 m/s and arrives at the edge of the hill. The car speeds up as it coasts down the hill. At the bottom, the road levels and the car continues coasting along the road at an increased speed. O A car coasts along at 30 m/s and arrives at a hill. The car speeds up as it coasts up the hill. At the top, the road levels and the car continues coasting along the road at an increased speed. O A car coasts along at 30 m/s and arrives at a hill. The car slows down as it coasts up the hill. At the top, the road levels and the car continues coasting along the road at a reduced speed. O A car coasts along at 30 m/s and arrives at the edge of the hill. The car slows down as it coasts down the hill. At the bottom, the road levels and the car continues coasting along the road at a reduced speed. Submit Provide Feedback Request Answer

Part A Select the correct "story" about a real object that has the motion diagram shown in the figure. O A car coasts along at 30 m/s and arrives at the edge of the hill. The car speeds up as it coasts down the hill. At the bottom, the road levels and the car continues coasting along the road at an increased speed. O A car coasts along at 30 m/s and arrives at a hill. The car speeds up as it coasts up the hill. At the top, the road levels and the car continues coasting along the road at an increased speed. O A car coasts along at 30 m/s and arrives at a hill. The car slows down as it coasts up the hill. At the top, the road levels and the car continues coasting along the road at a reduced speed. O A car coasts along at 30 m/s and arrives at the edge of the hill. The car slows down as it coasts down the hill. At the bottom, the road levels and the car continues coasting along the road at a reduced speed. Submit Provide Feedback Request Answer

Name: Please as soon as possible Part A0Select the correct "story" about a r
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Description: Please as soon as possible Part A0Select the correct "story" about a real object that has the motion diagram shown in the figure.O A car coasts along at 30 m/s and arrives at the edge of the hill. The car speeds up as it coasts down the hill. At the

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter2: One Dimensional Motion

Section: Chapter Questions

Problem 78PQ: Cars A and B each move to the right with constant acceleration along a straight road. The velocity...

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Cars A and B each move to the right with constant acceleration along a straight road. The velocity vectors of each car are shown in Figure P2.78 for several times separated by equal time intervals. For the entire interval from time t1 to time t4, car B is ahead of car A (that is, car B is to the right of car A), a. Is the acceleration of car B to the left, to the right, or zero? Explain. b. Is the magnitude of the acceleration of car A greater than, less than, or equal to the magnitude of the acceleration of car B? Explain your reasoning, c. Is the distance between car A and car B at time t3 greater than, less than, or equal to the distance between car A and car B at time t2? Explain.
Tadeh launches a model rocket straight up from his backyard that takes 4.50 s to reach its maximum altitude. (After launch, the rockets motion is only influenced by gravity.) a. What is the rockets initial velocity? b. What is the maximum altitude reached by the rocket?
An express train passes through a station. It enters with an initial velocity of 22.0 m/s and decelerates at a rate of 0.150m/s2 as it goes through. The station in 210.0 m long. (a) How fast is it going when the nose leaves the station? (b) How long is the nose of the train in the station? (c) If the train is 130 m long, what is the velocity of the end of the train as it leaves? (d) When does the end of the train leave the station?
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
A woodchuck runs 20 m to the right in 5 s, then rums and runs 10 m to the left in 3 s. (a) What is the average velocity of the woodchuck? (b) What is its average speed?
(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?
Pablo is running in a half marathon at a velocity of 3 m/s. Another runner, Jacob, is 50 meters behind Pablo with the same velocity. Jacob begins to accelerate at 0.5m/s2 . (a) How long does it take Jacob to catch Pablo? (b) What is the distance covered by Jacob? (C) What is the final velocity of Jacob?
A cyclist rides 8.0 km east for 20 minutes, then he turns and heads west for 8 minutes and 3.2 km. Finally, he rides east for 16 km, which takes 40 minutes. (a) What is the final displacement of the cyclist? (b) What is his average velocity?
An unwary football player collides with a padded goalpost while running at a velocity of 7.50 m/s and comes to a full stop after compressing the padding and his body 0.350 m. (a) What is his acceleration? (b) How long does the collision last?
A cyclist travels from point A to point B in 10 mm. During the first 2.0 mm of her trip, she maintains a uniform acceleration of 0.090m/s2 . She then travels at constant velocity for the next 5.0 nun. Next, she decelerates at a constant rate so that she cons to a rest at point B 3.0 mm later. (a) Sketch the velocity-versus-tine graph for the trip. (b) What is the acceleration during the last 3 mm? (c) How far does the cyclist travel?
A speedboat travels in a straight line and increases in speed uniformly from vi = 20.0 m/s to vf = 30.0 m/s in a displacement x of 200 m. We wish to find the time interval required for the boat to move through this displacement. (a) Draw a coordinate system for this situation. (b) What analysis model is most appropriate for describing this situation? (c) From the analysis model, what equation is most appropriate for finding the acceleration of the speedboat? (d) Solve the equation selected in part (c) symbolically for the boats acceleration in terms of vi, vf, and x. (e) Substitute numerical values to obtain the acceleration numerically. (f) Find the time interval mentioned above.
Freight trains can produce only relatively small accelerations and decelerations. (a) What is the final velocity of a freight train that accelerates at a rate of 0.0500 m/s2 for 8.00 min, starting with an initial velocity of 4.00 m/s? (b) If the train can slow down at a rate of 0.550 m/s, how long will it take to come to a stop from this velocity? (c) How far will it travel in each case?