A football player, starting from rest at the line of scrimmage, accelerates along a straight line for a time of 3.39 s. Then, during a negligible amount of time, he changes the magnitude of his acceleration to a value of 1.79 m/s². With this acceleration, he continues in the same direction for another 2.58 s. until he reaches a speed of 7.56 m/s. What is the value of his acceleration (assumed to be constant) during the initial 3.39-speriod? Number Units

An unidentified flying object (UFO) is observed to travel a total distance of 19000 m, starting and ending at rest, over a duration of 4.23 s. Assuming the UFO accelerated at a constant rate to the midpoint of its journey and then decelerated at a constant rate the rest of the way, what was the magnitude of its acceleration? Express your answer in g s , where 1 g = 9.81 m/s^2.

A pilot flies in a straight path for 1 h 30 min. She then makes a course correction, heading 10 degrees to the right of her original course, and flies 2 h in the new direction. If she maintains a constant speed of 640 mi/h, how far is she from her starting position?Your answer is______mi;

An unidentified flying object (UFO) is observed to travel a total distance of 23000 m, starting and ending at rest, over a duration of 2.59 s. Assuming the UFO accelerated at a constant rate to the midpoint of its journey and then decelerated at a constant rate the rest of the way, what was the magnitude of its acceleration? Express your answer in g s , where 1 g = 9.81 m/s^2.     699 g s     13,715 g s     6,857 g s     1,398 g s

A proton initially has = (-9.20)î + (8.00)î + (−9.20) and then 6.20 s later has 7 = (−19.0)î + (8.00)Ĵ + (−16.0)Â (in ✓ meters per second). (a) For that 6.20 s, what is the proton's average acceleration a avg in unit vector notation, (b) in magnitude, and (c) the angle between a avg and the positive direction of the x axis? (a) Number (b) Number (c) Number i pada Units Units i k Units

An unidentified flying object (UFO) is observed to travel a total distance of 29000 m, starting and ending at rest, over a duration of 4.77 s. Assuming the UFO accelerated at a constant rate to the midpoint of its journey and then decelerated at a constant rate the rest of the way, what was the magnitude of its acceleration? Express your answer in g s , where 1 g = 9.81 m/s^2.     520 g s     260 g s     5,098 g s     2,549 g s

The NEXT morning, you wake up in a strange room yet again, and this time you drop a ball from a height of 2.20 m above the floor. The ball hits the floor 0.335 s after your drop it. You guess that you must have been taken to an alien planet with gravity different from Earth s. What is this planet s g (that is, the magnitude of the acceleration due to gravity on this planet)?     39.2 m/s^2     19.6 m/s^2     29.4 m/s^2     62.7 m/s^2

A runner and a cyclist compete in a race over a straight course 20 km long. The runner runs at a steady speed of 10 m/s toward the finish line. The cyclist zips at a speed of 23 m/s toward the finish line for 12 km but upon seeing that he is already far ahead of the runner, he decides to stop and wait for the runner to catch up to him. The runner eventually reaches the cyclist and continues moving toward the finish line. The cyclist waits for a while after the runner passes and then cycles toward the finish line again at 23m/s.    Both the cyclist and the runner cross the finish line in the exact same instant. Assume both of them, when moving, move steadily at their respective speeds.  (a) How far is the runner from the finish line when the cyclist resumes the race?  (b) For how long in time was the cyclist stationery?

The infamous chicken is dashing toward home plate with a speed of 5.7 m/s when he decides to hit the dirt. The chicken slides for 1.2 s, just reaching the plate as he stops (safe, of course). (a) What are the magnitude and direction of the chicken’s acceleration? (b) How far did the chicken slide?

A car is traveling west at 22.5 m / s when it turns due south and accelerates to 37.5 m /s, alt during a time of 4.00 s. what is the magnitude of the car's average acceleration