Concept explainers
|| Two projectiles are fired at 20 m/s from the top a 50-m-tall building. Projectile A is fired at an angle of 30° above the horizontal, while projectile B is fired at an angle of 30° below the horizontal. Calculate (a) the time for each projectile to hit the ground and (b) the speed at which each hits the ground. What can you conclude about the relationship between the launch angle and the speed at which a projectile hits the ground?
Want to see the full answer?
Check out a sample textbook solutionChapter 3 Solutions
College Physics (10th Edition)
Additional Science Textbook Solutions
Conceptual Physics (12th Edition)
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
Physics (5th Edition)
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Cosmic Perspective Fundamentals
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
- A catapult launches a rocket at an angle of 53.0 above the horizontal with an initial speed of 100 m/s. The rocket engine immediately starts a burn, and for 3.00 s the rocket moves along its initial line of motion with an acceleration of 30.0 m/s2. Then its engine fails, and the rocket proceeds to move in free fall. Find (a) the maximum altitude reached by the rocket, (b) its total time of flight, and (c) its horizontal range.arrow_forwardA golfer hits a ball with an initial speed of 30.0 m/s at an angle of 50.0oabove the horizontal. The ball lands on a green that is 5.00 m above the level where the ball was struck. a) How long is the ball in the air? b) How far has the ball traveled in the horizontal direction when it lands? c) What is the speed and direction of motion of the ball just before it lands?arrow_forwardAn arrow is launched from ground level, with an initial speed of 27.2 m/s at an angle of 31.4° above the horizontal. Neglect air resistance, and take upward as the positive direction. a) How much time is needed for the arrow to reach its maximum height, b) what is this maximum heightc) how long does it take to land on the ground againd) how far does it travel right before it lands.arrow_forward
- A helicopter is flying with a constant horizontal velocity of 180 km/h and is directly above point A when a loose part begins to fall. The part lands 6.5 s later at point B on an inclined surface. Determine (a) the distance d between points A and B. (b) the initial height h. 180 km/h F10° Вarrow_forwardChinook salmon can jump out of water with a speed of 7.50 m/s. How far horizontally d can a Chinook salmon travel through me air if it leaves the water with an initial angle of 0 = 26.0° with respect to the horizontal? (Neglect any effects due to ir resistance.) m d = Question Source: Freedman College Physics Searrow_forwardThe train went horizontal speed 30 m/s Then the velocity decreased during a displacement of 150 m, so the velocity became 4 m/s, find the acceleration of the trainarrow_forward
- During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 1.42 km/s at an initial inclination of 65.7◦ to the horizontal. The acceleration of gravity is 9.8 m/s2. a) How far away did the shell hit in km. b) How long was it in the air in s?arrow_forwardAsap pleasearrow_forwardA brick is thrown upward from the top of a building at an angle of 40° to the horizontal and with an initial speed of 13 m/s. If the brick is in flight for 3.0 s, how tall is the building? marrow_forward
- Answer all parts of the questionarrow_forwardPlease answer this within 30 mins! I will upvote !arrow_forwardA pilot wants to drop survey markers at remote locations in the Australian outback. If the flies at a constant velocity of 31.6 m/s at an altitude of h= 30 m. and the marker is released with zero velocity relative to the plane, at what horizontal distance (meters) 'd' from the desired impact point should the marker be released?arrow_forward
- Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning