Concept explainers
A railroad flatcar is traveling to the right at a speed of 13.0 m/s relative to an observer standing on the ground. Someone is riding a motor scooter on the flatcar (Fig. E3.30). What is the velocity (magnitude and direction) of the scooter relative to the flat-car if the scooter’s velocity relative to the observer on the ground is (a) 18.0 m/s to the right? (b) 3.0 m/s to the left? (c) zero?
Figure E3.30
Learn your wayIncludes step-by-step video
Chapter 3 Solutions
University Physics with Modern Physics (14th Edition)
Additional Science Textbook Solutions
Physics: Principles with Applications
Physics for Scientists and Engineers with Modern Physics
College Physics
Essential University Physics: Volume 1 (3rd Edition)
Lecture- Tutorials for Introductory Astronomy
The Cosmic Perspective Fundamentals (2nd Edition)
- A 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_forwardWhile standing at the second floor balcony in an apartment building at 2 meters above the ground, Peter throws a tennis ball upward to Tom, who is standing at the seventh floor balcony at 10 meters above the ground. The velocity with which Peter throws the ball is equal to 13 m/s. Tom fails to catch the ball while it is still moving upward. The ball reaches the highest point in its motion trajectory and falls downward and lands in Tom's hands. What is the velocity magnitude of the ball when Tom catches it?arrow_forwardA person is standing 350 feet away from a model rocket that is fired straight up into the air at a rate of 15 ft/sec. At what rate is the distance between the person and the rocket increasing 30 seconds after liftoff?arrow_forward
- a student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18.0 m/s. the cliff is 50.0 m above a flat, horizontal beach as shown in figure p3.23. (a) what are the coor- dinates of the initial position of the stone? (b) what are the components of the initial velocity? (c) write the equations for the x- and y-components of the veloc- ity of the stone with time. (d) write the equations for the position of the stone with time, using the coor- dinates in figure p3.23. (e) how long after being released does the stone strike the beach below the cliffe (f) with what speed and angle of impact does the stone land? 23) e) 3.19 secs f) 36.1 m/s 60.1 degrees below the horizontalarrow_forwardEmily 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. How far from the base of the dorm does Allison stand to catch the ball, in meters? Use g = 10.0 m/s2.arrow_forwardA boy 11.5 m above the ground in a tree house throws a ball for his dog, who is standing right below the reee house and starts running the instant the ball is thrown. The boy throws the ball horizontally at 8.50 m/a. A.) how fast must the dog run too catch the ball just as it reaches the ground? Express the answer in meters per second. (V= blank m/s) b.) how far from the tree will the dog catch the ball? (D= blank meters)arrow_forward
- Daniel takes his two dogs, Pauli the Pointer and Newton the Newfoundland, out to a field and lets them loose to exercise. Both dogs sprint away in different directions while Daniel stands still. From Daniel's point of view, Newton runs due North at 3.90m/s, but from Pauli's point of view, Newton appears to be moving at 1.50 m/s due East. What must Pauli's velocity relative to Daniel be for this to be true? Express your answer in terms of the ? and ?‑components if North is the +? direction and East is the +? direction. a) ?-component (m/s): ?-component (m/s): b) Express your answer as a magnitude and an angle measured counter‑clockwise from due East.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_forwardThe velocity of the wind relative to the water is crucial to sailboats. Suppose a sailboat is in an ocean current that has a velocity of 2.3 m/s in a direction 28° east of north relative to the Earth. It encounters a wind that has a velocity of 4.5 m/s in a direction of 45° south of west relative to the Earth. What is the magnitude of the velocity of the wind relative to the water, in meters per second? What is the angle of the velocity of the wind relative to the water degrees south of west?arrow_forward
- H3.6. A bullet is fired from ground level at 120 m/s in the +55° direction. The bullet hits the ground x meters away. Using the formula (y = v0yt …) and obtain the time interval the bullet travels through air. Calculate how far from the point that it was fired the bullet will hit the ground.arrow_forwardA farm truck moves due east with a constant velocity of 9.50 m/s on a limitless, horizontal stretch of road. A boy riding on the back of the truck throws a can of soda upward (Fig. P3.54) and catches the projectile at the same location on the truck bed, but 16.0 m farther down the road. (a) In the frame of reference of the truck, at what angle to the vertical does the boy throw the can? (b) What is the initial speed of the can relative to the truck? (c) What is the shape of the can’s trajectory as seen by the boy? An observer on the ground watches the boy throw the can and catch it. In this observer’s frame of reference, (d) describe the shape of the can’s path and (e) determine the initial velocity of the can.arrow_forwardTrachecktory. Two cannonballs, aptly named a and B, were launched on level ground. a was launched with a velocity of 18.0 [m/s] at 36° with respect to the ground while B was launched with a velocity of 17.6 [m/s] at 48° with respect to the ground. What can you say about a and B's range and time of flight? O a and B have the same range; a has a larger time of flight. O a and B have the same range; B has a larger time of flight. O a and B do not have the same range; B has a larger time of flight. O a and B do not have the same range; a has a larger time of flight.arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON