![]() The projected coin also moved to the right but it fell downward at exactly the same rate as the dropped coin.In your notes, sketch what the motion of these two coins must have looked like Observations from the labBoth coins fall the same amount vertically in the same amount of time. We’ll revisit the question at the end of these notes. So What’s the Correct Answer?I’m not going to tell you. The object will continue to move forwards the entire time it is falling. ![]() The object will move forward at first, but will eventually just fall straight down.About 15% answered letter C. because some people referred to the coyote in cartoons, the researchers called it the Wile E. ![]() The object will stop in midair, and then start to fall straight down. The ResultsThe breakdown of answers they got was almost exactly the same at all ages.About 60% said letter A was correct. Write your prediction on the back of your homework – we will be adding to this at the end of this lesson, so keep it neat! Ī few years ago, researchers went to elementary, middle, and high schools as well as universities and showed students this image and asked them, B“Ignoring air resistance, which of the following correctly shows what an object would do if it rolled off a cliff? PredictionDetermine which path you believe the ball will follow AND WHY. PredictWhich path will the ball follow?ABC Make a PredictionIf this red ball had a net force to the right applied to it and rolled off the cliff at a constant speed, what would its path look like? Projectile MotionIt’s as easy as rolling off a cliff… Get out your spiral and something to write withQuick QuestionDoes horizontal velocity influence vertical velocity? Ball has is pushed so that its initial velocity is 10 m/s and ball B is pushed so that its initial velocity is 15 m/s.Ī) Find the time it takes each ball to hit the ground.Good Morning!Today we will: show your completed homeworkīegin working on PTG 2.4 (finish for homework)Do BEFORE THE BELL: get out your homework Problem 9 Two balls A and B of masses 100 grams and 300 grams respectively are pushed horizontally from a table of height 3 meters. Problem 8 The trajectory of a projectile launched from ground is given by the equation y = -0.025 x 2 + 0.5 x, where x and y are the coordinate of the projectile on a rectangular system of axes.Ī) Find the initial velocity and the angle at which the projectile is launched. Problem 7 A projectile starting from ground hits a target on the ground located at a distance of 1000 meters after 40 seconds.ī) At what initial velocity was the projectile launched? Ī) What is the initial velocity V 0 of the ball if its kinetic energy is 22 Joules when its height is maximum?ī) What is the maximum height reached by the ball Problem 6 A ball of 600 grams is kicked at an angle of 35° with the ground with an initial velocity V 0. Problem 5 A ball kicked from ground level at an initial velocity of 60 m/s and an angle θ with ground reaches a horizontal distance of 200 meters. Problem 4 A ball is kicked at an angle of 35° with the ground.Ī) What should be the initial velocity of the ball so that it hits a target that is 30 meters away at a height of 1.8 meters?ī) What is the time for the ball to reach the target? Problem 3 A projectile is to be launched at an angle of 30° so that it falls beyond the pond of length 20 meters as shown in the figure.Ī) What is the range of values of the initial velocity so that the projectile falls between points M and N? The projectile hits the incline plane at point M.Ī) Find the time it takes for the projectile to hit the incline plane. ![]() Problem 2 A projectile is launched from point O at an angle of 22° with an initial velocity of 15 m/s up an incline plane that makes an angle of 10° with the horizontal. Problem 1 An object is launched at a velocity of 20 m/s in a direction making an angle of 25° upward with the horizontal.Ī) What is the maximum height reached by the object?ī) What is the total flight time (between launch and touching the ground) of the object?Ĭ) What is the horizontal range (maximum x above ground) of the object?ĭ) What is the magnitude of the velocity of the object just before it hits the ground? An interactive html 5 applet may be used to better understand the projectile equations. These problems may be better understood when Projectile problems are presented along with detailed solutions.
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