Concept explainers
While driving north at 25 m/s during a rainstorm you notice that the rain makes an angle of 38° with the vertical. While driving back home moments later at the same speed but in the opposite direction, you see that the rain is falling straight down. From these observations, determine the speed and angle of the raindrops relative to the ground.
Trending nowThis is a popular solution!
Learn your wayIncludes step-by-step video
Chapter 4 Solutions
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Additional Science Textbook Solutions
College Physics: A Strategic Approach (4th Edition)
Conceptual Integrated Science
University Physics Volume 1
Sears And Zemansky's University Physics With Modern Physics
University Physics (14th Edition)
Physics: Principles with Applications
- A javelin thrower standing at rest holds the center of the javelin behind her head, then accelerates it through a distance of 70 cm as she throws. She releases the javelin 2.0 m above the ground traveling at an angle of 30 degrees above the horizontal. Top-rated javelin throwers do throw at about a 30 degree angle, not the 45 degree you might have expected, because the biomechanics of the arm allow them to throw the javelin much faster at 30 degrees than they would be able to at 45 degrees . In this throw, the javelin hits the ground 64 m away. What was the acceleration of the javelin during the throw? Assume that it has a constant acceleration.arrow_forwardThe pitcher in a softball game throws a ball with an initial velocity v0 of 72 km/h at an angle a with the horizontal. If the height of the ball at point B is 0.68 m, determine (a) the angle a, (b) the angle 0 that the velocity of the ball at point B forms with the horizontal.arrow_forwardA projectile is launched on earth at an angle θ, relative to horizontal direction. At half of its maximum height the speed of the projectile is 1.00 m/s, and at its maximum height the speed of the projectile is 0.41 m/s. What is the angle θ ?θ = °arrow_forward
- A soccer player decides that he can make this goal to win the game so he kicks the ball with a speed of 8.5 m/s at an angle of 25.0° above the horizontal. How long was the ball in the air, assuming that the ball lands on the same level it was kicked.arrow_forwardFrom these observations, determine the speed of the raindrops relative to the ground. Determine the angle of the raindrops relative to the ground.arrow_forwardA bullet is fired from ground level with a speed of 150 m/s at an angle 30° above the horizontal at a location where g = 10.0 m/s2. How long does it take before the bullet hits the ground?arrow_forward
- You were hiding in a tree 5 m above the ground when you spotted a rabbit on the ground. You took a pebble and shot it with your sling shot. You missed. You estimated you were aiming downward at -50 degrees (i.e. below horizontal) with an initial speed of 5.0 m/s. How far did the pebble land horizontally away from you?arrow_forwardDominador, who is standing on the edge of an 80-m tall cliff facing the sea, kicks a ball horizontally at a speed of 13.01 m/s. How far from the base of the cliff will the ball hit the sea water? Let be the initial vertical position of the ball, with positive position in the upward direction. The vertical displacement of the ball from the edge of the cliff to the seawater is:arrow_forwardA football quarterback is moving straight backwards at a speed of 2.9m/s when he throws a pass to a player 22 m straight downfield. The ball is thrown at an angle of 21 degrees relative to the ground and is caught at the same height as it is released. What is magnitude of the initial velocity of the ball relative to the quarterback in m/s? What angle above the horizontal does the initial velocity of the ball relative to the quarterback make? Give your answer in degrees.arrow_forward
- Problem 4: A person shoots a gun at a target that is 65 m away. The center of the target is at the same height as the gun. The person aims the gun upward at an angle so that the bullet hits the center of the target. The bullet leaves the gun at a velocity of 210 m/s. What is the angle of the gun in degrees from the positive x-axis? Numeric : A numeric value is expected and not an expression.arrow_forwardJonah is reading a novel that describes an athlete participating in an archery competition. The athlete is 186 cm tall and hits an amazing shot where they fire the arrow completely horizontally and it lands 51 m away from them. 1) neglecting air resistance and drag, what must the initial speed of the arrow be? 2) if the arrow was instead fired at an angle of 45°, how far would it have travelled if it was launched at 187m/s?arrow_forwardWhile standing on the roof of a building, a child tosses a tennis ball with an initial speed of 16 m/s at an angle of 25° below the horizontal. The ball lands on the ground 3.5 s later. How tall, in meters, is the building?arrow_forward
- University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University