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Suppose you are in a rocket with no windows, traveling in deep space far from other objects. Without looking outside the rocket or making any contact with the outside world, explain how you could determine whether the rocket is (a) moving forward at a constant 80% of the
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- A baseball player wants to hit a home run over the wall of a stadium. The player swings the baseball bat so that it hits the ball when it is at a height of 0.992 mm above the ground. The ball flies off at an angle of 30∘30∘ above the horizontal and at a speed of 35.9 m/sm/s. What is the tallest wall that the player can clear (i.e., get the ball over) if the wall is 84.2 m m away horizontally? Please enter a numerical answer below. Accepted formats are numbers or "e" baarrow_forwardYou go watch your friend as she runs at a cross country meet. The first time she passes you, your friend runs by going due north at a speed of 4.40 m/s. You move to a different place on the course and twelve minutes after you saw her the first time, your friend runs past you again. This time she is traveling at a speed of 3.80 m/s in the direction 30.0◦ W of S. What is the direction of her average acceleration between those same two times?arrow_forwardPROBLEMS 11.1◆ Speed addition. Darnell stands in a railroad coach that moves at speedc relative to the Earth. He tosses a tennis ball forward at speed c relative to the train. If common sense were correct, the tennis ball would be moving at speed c relative to the Earth. a. How fast does the tennis ball really move relative to the Earth? Darnell stands in a railroad coach that moves at speed c relative to the Earth. He tosses a tennis ball forward at speed c relative to the train. If common sense were correct, the tennis ball would be moving at speed c relative to the Earth. b. How fast does the tennis ball really move relative to the Earth?arrow_forward
- A rocket is moving in a gravity free space with a constant acceleration of 2ms² along +x direction (see figure). The length of a chamber inside the rocket is 4m. A ball is thrown from the left end of the chamber in +x direction with a speed of 0.3ms-1 relative to the rocket. At the same time, another ball is thrown in –x direction withaspeed of 0.2ms-1 from its right end relative to the rocket. The time in seconds when the two balls hit each other is: = 2 ms 2 -1 0.3 ms 0.2 ms- X 4 marrow_forwardOK, this is the last time for one of these crazy adventures. THIS time, though, there is a window in the floor, and you can see that you re in a rocket which has just taken off from the surface of an alien planet. By taking careful measurements out that window you determine that the rocket is accelerating upward at 7.42 m/s^2. When you drop a ball from a height of 1.74 m, it hits the floor 0.254 s later. What is the value of g for the alien world below you? 1. 63.8 m/s^2 55.2 m/s^2 3 79.1 m/s^2 4 46.5 m/s^2arrow_forwardAn astronaut with a mass of 75.8kg, finds herself 34.7m from her spaceship. The only way for her to return to the ship is to throw her 0.450kg wrench directly away from the ship. If she throws the wrench with a speed of 20.3m/s, how many seconds does it take her to reach the ship?arrow_forward
- OK, this is the last time for one of these crazy adventures. THIS time, though, there is a window in the floor, and you can see that you re in a rocket which has just taken off from the surface of an alien planet. By taking careful measurements out that window you determine that the rocket is accelerating upward at 8.07 m/s^2. When you drop a ball from a height of 1.46 m, it hits the floor 0.245 s later. What is the value of g for the alien world below you?arrow_forwardA 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 ∘ above the horizontal. Top-rated javelin throwers do throw at about a 30 ∘ angle, not the 45 ∘ you might have expected, because the biomechanics of the arm allow them to throw the javelin much faster at 30 ∘ than they would be able to at 45 ∘ . In this throw, the javelin hits the ground 72 m away. What was the acceleration of the javelin during the throw? Assume that it has a constant acceleration. Express your answer to two significant figures and include the appropriate units.arrow_forwardAn astronaut in deep space is at rest relative to a nearby space station. The astronaut needs to return to the space station. A student makes the following claim: “The astronaut should position her feet pointing away from the space station. Then, she should repeatedly move her feet in the opposite direction to each other. This action will propel the astronaut toward the space station.” Is the student’s claim correct? Justify your selection. a Yes. The astronaut’s feet will have a velocity that is transferred to her center of mass, accelerating the astronaut toward the space station. b No. The astronaut would move away from the space station, not toward it, since her feet are pointed away from the space station. c Yes. The astronaut’s feet exert a force away from the space station, creating an equal and opposite force that will accelerate the astronaut toward the space station. d No. The astronaut’s feet are not exerting a force on another object, so…arrow_forward
- An experimentalist in a laboratory finds that a particle has a helical path. The position of this particle in the laboratory frme is given by r(t)= R cos(wt)i + R sin(wt)j + vztk R,vz, and w are constants. A moving frame has velocity (Vm)L= vzk relative to the laboratory frame. In vector form: A)What is the path of the partical in the moving frame? B)what is the velocity of the particle as a function of time relative to the moving frame? C)What is the acceleration of the particle in each frame? D)How should the accelerartion in each frame be realted?Does your answer to part c make sense?arrow_forwardYou are lucky enough to visit a particular location in the universe that has zero gravity and no air resistance, so you decide to perform a simple experiment by throwing a rock horizontally. What type of motion do you observe?arrow_forwardVictoria is standing on a boat, during a perfectly calm day. Initially, both are not moving. Then Victoria walks from one end of the boat to the other. Take the initial time to be before she walks and the final while still walking. b) Compare the final speed of the boat with Victoria’s final speed. Are they the same or different? Why?arrow_forward
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning