Take a piece of paper and a ball of any size. Seek out a location with a high elevation. I want you to simultaneously drop the piece of paper and the ball. Which object is the quickest to fall? What could be the reason for this?
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- A student throws a heavy red ball horizontally from a balcony of a tall building with an initial speed vi. At the same time, a second student drops a lighter blue ball from the balcony. Neglecting air resistance, which statement is true? (a) The blue ball reaches the ground first. (b) The balls reach the ground at the same instant. (c) The red ball reaches the ground first. (d) Both balls hit the ground with the same speed. (e) None of statements (a) through (d) is true.Emily throws a soccer ball out of her dorm window to Allison, who is waiting below to catch it. Emily throws the ball at an angle of 30° below horizontal with a speed of 12 m/s, and Allison catches it 2.5 s later. What is the vertical distance between Emily and Allison, in meters? Use g = 10.0 m/s2.From a distance of 20 centimeters, a miniature toy catapult fires a shot. With the marble on top, the building stands 13.5 cm tall, while the marble in the catapult stands 7 cm tall. If the mini toy catapult launches the marble at a 0 degree angle, what is the initial velocity of the marble required to strike the other marble at the top of the building? How much time do we require? How much energy/force is required to launch the catapult.
- A projectile is launched with an initial velocity of v0 and an elevation angle of zero degrees. If the projectile were launched with the same initial velocity from the surface of Earth (g=9.80 m/s2) as from the surface of Mars (g=3.72 m/s2), which of the following would be true? a. Both the time of flight and the range would be larger on Mars. b. Both the time of flight and the range would be larger on Earth. c. The time of flight is greater on Earth but the range would be greater on Mars. d. The time of flight is greater on Mars but the range would be greater on Earth. e. The time of flight and the range would be the same on both planets.A cannon fires a shell traveling 150 m/s in the horizontal direction and 150 m/s in the vertical direction. The cannon is on a cliff 100 meters above the ocean water below. What is the maximum altitude (in meters) above the water the cannon ball reaches?A friend of yours has a one story house with a pool in the backyard. Someone gets the bright idea to jump from the roof of the house into the deep end of the pool. a) If the roof of the house is 16 ft tall and the horizontal distance between the edge of the house and the pool is 10 ft, what would the jumper's minimum velocity need to be to land in the pool? b) Let's assume your friend can jump with an initial horizontal velocity of 15 ft/s. What is their total velocity when they hit the water? (hint: determine both the x and y velocity components, find the resultant)
- You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. The soccer ball is kicked at 50° from the edge of the building with an initial velocity of 10 m/s and lands 20 meters away from the wall of the building. You will be asked to find how tall the building is that the child is standing on. Draw a picture showing the trajectory of the ball. Find the x- and y-components for the initial velocity. Group of answer choices A. v0x = 7.7 m/s; v0y = 6.4 m/s B. v0x = 6.4 m/s; v0y = 7.7 m/s C. v0x = 0 m/s; v0y = 10 m/s D. v0x = 10 m/s; v0y = 0 m/sA pitcher throws a fastball horizontally toward home plate 18.39 meters away. If the ball is traveling at a constant speed of 40.0m/s, neglecting air friction, how long does it take for the ball to get to home plate? What are the givens in the problem? What are the unknowns? What equation should you use to find the unknown? What is the correct answer?An Olympic diver is on a diving platform 4.5 m above the water. To start her dive, she runs off of the platform with a speed of 1.3 m/s in the horizontal direction. Determine the diver's speed just before she enters the water. 4.7 m/s 9.5 m/s 6.4 m/s 0 m/s
- The hole on a level, elevated golf green is a horizontal distance of 120 m from the tee and at an elevation of 12.2 m above the tee. A golfer hits a ball at an angle of 9.7° above the horizontal and makes a hole-in-one! What was the initial speed of the ball?The Zero Gravity Research Facility at the NASA Glenn Research Center includes a 145 m drop tower. This is an evacuated vertical tower through which, among other possibilities, a 1 m diameter sphere containing an experimental package can be dropped. How long is the sphere in free fall?A cannonball is shot from a cannon at a launch angle of 350 and an initial velocity of 147 m/s. Assuming NO air resistance, what is the intial horizontal velocity of the cannonball. 120 m/s 9.8 m/s 147 m/s 51.45 m/s Previous Page Next Page 99+ Page 2 of 5
