Who wins? • View Available Hint(s) A Porsche challenges a Honda to a 100-m race. Because the Porsche's acceleration of 3.5 m/s² is larger than the Honda's 3.0 m/s² , the Honda gets a 1.0 s head start. Honda Porsche Submit Previous Answers v Correct Part B By how many seconds? Express your answer in seconds to two significant figures. • View Available Hint(s) ? At = Submit Previous Answers 國

Who wins? • View Available Hint(s) A Porsche challenges a Honda to a 100-m race. Because the Porsche's acceleration of 3.5 m/s² is larger than the Honda's 3.0 m/s² , the Honda gets a 1.0 s head start. Honda Porsche Submit Previous Answers v Correct Part B By how many seconds? Express your answer in seconds to two significant figures. • View Available Hint(s) ? At = Submit Previous Answers 國

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter2: Kinematics

Section: Chapter Questions

Problem 9CQ: There is a distinction between average speed and the magnitude of average velocity. Give an example...

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youtube.com/watch?v=srDeACrSf-o&t=12s In the video, I drop a ball off a three-story balcony. We know that objects in freefall follow the equation for height h, in meters, h=−4.9t2+ch=-4.9t2+c, where t is time in seconds, and c is the initial height. A student timed the drop at 1.51 seconds.Use this to determine the height from which the ball was dropped, to at least 2 decimal places.
University Physics 1 - Kinematics: (Human reaction time using a ruler) Which out of these 4 equations of constant acceleration, with factors likeex. Distance - meters = 0.19mgravitational acceleration - a = 9.8 m/s^2no velocity - Vo = 0 Reaction time - s =? can bet set fit to find the reaction time (s)? even if you need to rewrite the equation formulas to best meet the units displayed above.
The 1992 world speed record for a bicycle (human-powered vehicle) was set by Chris Huber. His time through the measured 200 m stretch was a sizzling 6.509 s, at which he commented, “Cogito ergo zoom!” (I think, therefore I go fast!). In 2001, Sam Whittingham beat Huber’s record by 19.0 km/h. What was Whittingham’s time through the 200 m?
The 1992 world speed record for a bicycle (human-powered vehicule) was set by Chris Huber. His time through the measured 200m stretch was a sizzling 6.509 s, at which he commented "Cognito ergo zoom". In 2001, Sam Whittingham's beat Hubert's record by 19.0km/h. What was Whittingham's time through the 200m? (hint: d=rt).
Hi there! I am not exactly sure how this website works, however, here is a question I could use some guidane with. Rosana takes her puppy for a walk, but they can't stray too far from home or the puppy gets nervous! They walk 342 m south, then 579 m north, all in a time of 12.3 minutes. What is their speed? Thanks!
Hello, I have already asked this question but the previous answer came back wrong when I checked it. A world record was set for the men’s 100-m dash in the 2008 Olympic Games in Beijing by Usain Bolt of Jamaica. Bolt “coasted” across the finish line with a time of 9.69 s. If we assume that Bolt accelerated for 3.00 s to reach his maximum speed, and maintained that speed for the rest of the race, calculate his maximum speed and his acceleration. Previeous answer: Maximum speed=v=8.9 m/smagnitude of acceleration =2.97 m/s2
Hi I am currently struggling with Extra 1 and Extra 2
this is the problem that I was given. I am asked to find the horizontal distance to collision which I found by distance/height=tan(theta). I am asked to calculate time ofcollision which I did by taking distance/speed (in km/s). I am also asked to calculate the constant A from the accleration equation. I find A by taking the intgral of the acceleration twice to find my position formula. I plug in zero for t to get A/b^2=position. I find position by taking pythagorean theorem of height and distance, then multiply what I get by b^2. My reasoning is wrong somehwere as I keep getting the wrong answers (the answers I get are shown in the second picture). Can you please exlain where I am going wrong and provide a correct example/reasoning?
My question isn't how to solve the problem exactly. In fact, it's already been solved on this website. My question is about the acceleration. When I solve this problem myself, first I calculate the velocity by dividing 100m by 53s. I get 1.89m/s. Then I use that to find the acceleration using the equation vf = vi + at. That's 1.89/53 = 0.036m/s^2. That's not correct. The correct way to find the acceleration is to us the equation d = 1/2 at^2 and solve that way without taking the intermediate step of finding the velocity. Doing it that way, the acceleration is 0.0712m/s^2. My question is why you get a different result doing it the first way than you get doing it the second way.
In 2008, at the Beijing Olympics, Usain Bolt of Jamaica reclaimed his title as the world's fastest man. He completed the l00m final in a world record time of 9.69 s. He accelerated uniformly from rest for the first 6.5 seconds, covering 60 m before coasting at maximum speed to the finish. Calculate his average speed for the first 6.5 s.
1. Calculate the velocity of the runner that can travel 10000 cm in 2 minutes? 2. It takes a fast swimmer about 125 seconds to complete a 6.5 km freestyle. What is the speed of the swimmer? -Kindly provide the given, solution, answer, and unit formula.
3.) You throw a ball straight up. The ball leaves your hand at a height of 2.00 m above the ground with a speed of 20.0 m/s (~45 mph). Ignore air resistance and use g = 10.0 m/s2 to answer the following questions. You can use a spreadsheet but show your sample calculations. 3a.) Calculate the height, y(t), and velocity, vy(t), at 0.50 second intervals until the ball hits the ground. Show your results in a table and put the units in the column headers: t (s), vy (m/s), y (m). 3b.) Use this data to draw a motion diagram for the ball at 0.50 second intervals. Label the height and the speed at each time interval. Label the origin, starting height, maximum height, and final height. Include the velocity vectors for each time and location of the ball. 3c.) Calculate the time it takes for the ball to hit the ground and the final velocity of the ball just as it hits the ground. Include this velocity vector in your diagram.