2. In a physics experiment, you drop a ball from the 3rd floor of front atrium stairwell, to the ground below. The total drop height of the ball was 12.8 m [down]. The ball was dropped from rest. Assume air resistance can be ignored. a) Find the time for the ball to land on the ground below. b) Find the final velocity of the ball just before it landed.
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- A skier leaves the end of a horizontal ski jump at 22.0 m/s and falls through a vertical distance of 3.20 m before landing. Neglecting air resistance, (a) how long does it take the skier to reach the ground? (b) How far horizontally docs the skier travel in the air before landing? (Sec Section 3.4.)(a) A daredevil is attempting to jump his motorcycle over a line of buses parked end to end by driving up a 32° ramp at a speed of 40.0 m/s (144 km/h). How many buses can he clear if the top of the takeoff ramp is at the same height as the bus tops and the buses are 20.0 m long? (b) Discuss what your answer implies about the margin of error in this act—that is, consider how much greater the range is than the horizontal distance he must travel to miss the end of the last bus. (Neglect air resistance.)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.
- 3.) A ball is dropped (from rest) from the top of a building at HCC. It travels for 3.0 seconds before it hits the ground below. Assume free-fall occurs (no air resistance). a) How tall is the building? b) How fast is the ball traveling when it hits the ground? c) If the ball was dropped from twice the height, how long will it take to hit the ground?2. You look outside of your window in your apartment on the 5th floor. You see a ball going straight up and measure the time it takes for the ball to cross the window from the bottom to the top t = 0.774s. The distance between the bottom and the top of the window is h= 1.09m. a) What is the velocity of the ball when it passes the bottom of the window? b) After some time, you observe that the ball is coming straight down outside the window, what is the time it takes for the ball to pass from the top to the bottom of the window? c) Calculate the maximal height the ball will reach, measured from the bottom of the window.A student throws a water balloon vertically downward from the top of the building. The balloon leaves the thrower’s hand with a speed of 6.0m/s. Air resistance may be ignored so the water balloon is in free fall after it leaves the thrower’s hand. a) What is it’s speed after falling 2.0s? b) How far does it fall in 2s? c) What is the magnitude of it’s velocity after falling 10m?
- A ball is thrown from the ground to a maximum height of 12.4 meters, landing on a roof 4.2m high, 16 meters away. 12.4m 16m 4.2m a. Calculate the initial vertical velocity. b. Calculate the time it takes for the ball to reach maximum height, then the time it takes for it to fall back down, to get the total time in the air. c. Calculate the horizontal velocity. d. Calculate the total initial velocity (both magnitude and direction).3. Suppose you are taking a hike at Mt. Pulag with a terrain slope of 24° from the horizontal. After walking 70 meters, you stopped at point B and throw a stone - perpendicular to the terrain - back to your initial position to determine the velocity of the stone to reach the ground. a. Determine the maximum height reached by the stone measured from point B. b. If your initial velocity is 18.64 m/s, what is the time of travel of the stone back to your initial position?I need help with this problem A student in Physics 211 decides to do an experiment. They travel to a city and climb to the roof of a building that is 3.0 x 102 m tall. Then, at the same instant, they drop one rock while a second rock is thrown downward with an initial speed of 16 m/s. Assume both rocks experience negligible air resistance while falling. How much EARLIER does the thrown rock strike the ground? A) 1.1 s B) 1.5 s C) 1.4 s D) they land exactly at the same time
- A person stands on a bridge and throws a ball vertically upward with an initial speed of 10.0 m/s. The ball rises, and as it falls past the edge of the bridge where it was released, a second ball is thrown downward with a velocity of 10.0 m/s. Which of the following statements are correct? I. The first ball will hit the ground before the second ball. II. The second ball will hit the ground before the first ball. III. The two balls will hit the ground at the same time. IV. Both balls will be falling with the same velocity as they hit the ground.A ball is thrown vertically upward from the top of a building with an initial velocity of 20 m/s at an initial height of 50 m above the ground. The ball just misses the roof on its way down. a) Determine the time needed for the ball to reach the ground.b) Determine the velocity and position of the ball at t=5 sec2. Niko accidently throws his cellphone out of an open window horizontally with a velocity of 4.5 m/s. Niko quickly looks out the window and notices a friend outside. The window is 8.5 m above the ground. How far away from the building should the friend stand to catch the cell phone at ground level?