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- (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.) Scenes in films or television programs sometimes show people jumping off moving trains and having unpleasant encounters with the ground. If someone is on a moving flatbed train car and wishes to jump off, how could the person use the concept of relative speed to make a safer dismount?George walks to a friend’s house. He walks 750 meters North, then realizes he walked too far. He turns around and walks 250 meters South. The entire walk takes him 13 seconds. What is his speed per second? What is his velocity in meters per second? Please show the formula you use and explain it in an easy to understand way.In 10.0 seconds, the braking of an automobile reduces its speed from 58 miles per hour to 32 miles per hour. How far does the vehicle drive during this time?Note: 1 mile Equals 1609 meters.
- Describe the appearance of the distance- time graph of an object moving with constant accelerated motion.Imagine you were standing in front of a motion detector, which was measuring your position as a function of time as you moved towards and/or away from the sensor. If the graph below, figure 2.4, shows this data, describe your motion during data collection in terms of your speed and direction.A swimmer stepped off the bridge and hit the water 1.5 s later. How fast was the swimmer moving when he hit the water? What would the swimmer’s drop time be if the bridge were twice as high? Write your answer in one decimal only.
- The graph below shows the speed of a ball vs time. What explanation best describes the movement of this ball shown on the graph?Describe your idea about PHYSICS IN MOTION in three to five sentences.A car drives east for two hours at 40 miles per hour. After stopping for two hours, it then drives east for another three hours at 60 miles per hour. Which of the following graphs correctly represents the distance versus time for this motion.
- You and your classmates run a 100 meter sprint to see who is the fastest. Of course you are with a time of 11.2 seconds. Not bad! So you're pretty fast. Are you also smart? Can you report your velocity? What was it? Show your work or explain your answer.Otto Emissions is driving his car at 11.2 m/s. Otto accelerates at 1.6 m/s2for 7 seconds. Otto then maintains a constant velocity for 15 more seconds. Determine the distance that Otto coverred in the entire travel time. Round off your final answer to three decimal places.A train is traveling at a velocity of 85 feet per second when it hits its brakes. It slows down at a constant rate of 0.8 feet per second each second until it stops. DO NOT ROUND YOUR ANSWERS. 1) How long will it take the train to stop? Answer in decimal form. 2) After it hits its brakes, how many feet will it travel before it stops? Answer in decimal form.