Concept explainers
BIO Ballistic seed dispersal. Some plants disperse their seeds by having the fruit split and contract, propelling the seeds through the air. The trajectory of these seeds can be determined by using a high-speed camera. In one type of plant, seeds are projected at 20 cm above ground level with initial speeds between 2.3 m/s and 4.6 m/s. The launch angle is measured from the horizontal, with +90° Corresponding to an initial velocity straight upward and −90° straight downward
58. The experiment is designed so that the seeds will move no farther than C.20 mm between photographic frames What minimum frame rate for the high-speed camera is needed to achieve this?
- A. 250 frames/s
- B. 2500 frames/s
- C. 25,000 frames/s
- D. 250,000 frames/s
Want to see the full answer?
Check out a sample textbook solutionChapter 3 Solutions
College Physics (10th Edition)
Additional Science Textbook Solutions
Conceptual Integrated Science
Physics for Scientists and Engineers with Modern Physics
Essential University Physics: Volume 1 (3rd Edition)
Introduction to Electrodynamics
University Physics with Modern Physics (14th Edition)
The Cosmic Perspective Fundamentals (2nd Edition)
- A firefighter, a distance d from a burning building, directs a stream of water from a fire hose at angle i above the horizontal as shown in Figure P3.16. If the initial speed of the stream is vi, at what height h does the water strike the building? Figure P3.16arrow_forwardA basketball player is standing on the floor 10.0 m from the basket as in Figure P3.47. The height of the basket is 3.05 m, and he shoots the ball at a 40.0 angle with the horizontal from a height of 2.00 m. (a) What is the acceleration of the basketball at the highest point in its trajectory? (b) At what speed must the player throw the basketball so that the ball goes through the hoop without striking the backboard?arrow_forwardA high jumper leaves the ground with an initial velocity of 11.1 m/s rightward at an angle of 17°. What is the high jumper's initial horizontal velocity, in m/s? Answer: m/sarrow_forward
- A Chinook salmon can jump out of water with a speed of 7.30 m/s . How far horizontally ? can a Chinook salmon travel through the air if it leaves the water with an initial angle of ?=30.0° with respect to the horizontal? (Let the horizontal direction the fish travels be in the +? direction, and let the upward vertical direction be the +? direction. Neglect any effects due to air resistance.)arrow_forwardFrom the top of a cliff overlooking a lake, a person throws two stones, as shown in the drawing. The cliff is 33.7 m high. The two stones described have identical initial speeds of v0 = 13.9 m/s and are thrown at an angle θ = 21.0 °, one below the horizontal and one above the horizontal. What is the distance between the points where the stones strike the water? Neglect air resistance. I do not know where to startarrow_forwardProblem 12: Mt. Asama, Japan, is an active volcano complex. In 2009, an eruption threw solid volcanic rocks that landed far from the crater. Suppose that one such rock was launched at an angle of 0 = 52.3 degrees above horizontal, and landed a horizontal distance d = 850 m from the crater, and a vertical distance h = 620 m below the crater. Part (a) Write and expression for vo, the initial speed of the rock in terms of 0, d, and h. Expression : Vo = Select from the variables below to write your expression. Note that all variables may not be required. cos(a), cos(4), cos(0), sin(a), sin(), sin(0), ß, y, 0, d, g, h, m, n, P Part (b) What is the initial speed of the rock in m/s? Numeric :A numeric value is expected and not an expression. Vo = Part (c) How long, in seconds, was the rock in the air? Numeric :A numeric value is expected and not an expression. t =arrow_forward
- Problem 5: While competing in the long jump, a person leaps over a smooth horizontal sand surface. She lands on the surface with speed vf = 8.5 m/s at an angle = 37° below horizontal. Assume that the person moves without air resistance. Use a Cartesian coordinate system with the origin at her final position. The positive x-axis is directed from her initial to her final position, and the positive y-axis is directed vertically upwards. Part (c) What x position, in meters, did the jumper begin her long jump? x0 = ||arrow_forwardA human cannon ball is fired at an angle of 60 degrees and speed of 25m/s. If the net is located 35 meters in front of the human cannon, how high in the air should the net be placed so the human lands in the center of it. Please Use the equations providedarrow_forwardWhile competing in the long jump, a person leaps over a smooth horizontal sand surface. She lands on the surface with speed vf = 7.75 m/s at an angle = 33° below horizontal. Assume that the person moves without air resistance. Use a Cartesian coordinate system with the origin at her final position. The positive x-axis is directed from her initial to her final position, and the positive y-axis is directed vertically upwards. Part (a) Enter an expression for the jumper's initial velocity vector in terms of vf, 0, g, and the unit vectors i and j. Vo = Vf cos(0) i+vf sin(0) j✔ Correct! Part (b) Calculate the maximum height, in meters, that the jumper reaches above ground level. ✓ Correct! hmax=0.908 33% Part (c) What x position, in meters, did the jumper begin her long jump? xo =arrow_forward
- A 2.00-m-tall basketball player is standing on the floor 10.0 m from the basket, as in Figure P3.44. If he shoots the ball at a 40.0° angle with the horizontal, at what initial speed must he throw the basketball so that it goes through the hoop without striking the backboard? The height of the basket is 3.05 m. {40.0° 3.05 m 2.00 –10.0 m - Figure P3.44arrow_forwardII. Step by step solution 1. stone is thrown from the bottom of a building upward at an angle of 60.0° to the horizontal with an initial speed of v=10.0 m/s as shown in figure. What is the magnitude and direction of the stone's velocity just before it strikes the ground? 60° 2. Given F1 =(12.0 i+ 10.0 j)N vector ; vector F2 has x and y components of -25 N and 30 N respectively. If F;- 5F2-4F= 0, what are the components of F?arrow_forwardYou can use the formula for centripetal acceleration OR You have to calculate the average acceleration directly from the definition, a = delta v / delta t. You have to first get a_x by using the velocity's initial and final x components, do a_y from the y components, and then use the Pythagorean formula to get the magnitude of the acceleration vector.arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning