Concept explainers
Sunjamming. A “sun yacht” is a spacecraft with a large sail that is pushed by sunlight. Although such a push is tiny in everyday circumstances, it can be large enough to send the spacecraft outward from the Sun on a cost-free but slow trip. Suppose that the spacecraft has a mass of 900 kg and receives a push of 20 N. (a) What is the magnitude of the resulting acceleration? If the craft starts from rest, (b) how far will it travel in 1 day and (c) how fast will it then be moving?
Want to see the full answer?
Check out a sample textbook solutionChapter 5 Solutions
Fundamentals of Physics Extended
Additional Science Textbook Solutions
Fundamentals Of Thermodynamics
Conceptual Physics: The High School Physics Program
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Essential University Physics: Volume 1 (3rd Edition)
Physics (5th Edition)
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
- A student is on the roof of the SP building, 15.0 m above the ground. Your physics instructor, who is 163 cm tall, is walking alongside the building at a constant speed of 0.35 m/s. If you wish to drop an egg on your instructors head, where should the instructor be when you release the egg? Assume the egg is in free fall and air friction is “negligible”.arrow_forwardSome forms of cancer can be treated using proton therapy in which proton beams are accelerated to high energies, then directed into a tumour, killing the malignant cells. Suppose a proton accelerator is 5.0 m long and must accelerate protons from rest to a speed of 3.0 × 10" m/s. (a) Determine the magnitude of the acceleration required. (b) Determine the magnitude of the force that must be applied to the protons (note: m, = 1.67 × 10-27 kg). (c) Determine the magnitude of the electric field that could be used to accelerate the protons.arrow_forwardSpring Gun: Planet X was just discovered orbiting a nearby star! It orbits a start that is 6.9 times the mass of our sun in a solar system just 31.3 light-years away. The acceleration due to gravity there is 0.07 g. After making some measurements in lab, you start to daydream about travel to other planets. Your spring gun can launch a projectile with a speed of 3.7 m/s. What would happen if you were to launch a projectile at an angle of 32 ° above horizontal on Planet X? (a) What maximum height would the projectile reach? (b) How far would the projectile travel before it hit the ground? Assume the projectile lands at the same height it was launched from.arrow_forward
- You are in an elevator that is initially at rest. At t=0, it heads downward and speeds up as a function of time. It experiences a velocity given by v(t) = (−2.00t²ĵ)² m S a) What is the normal force that you experience at t=1.20 s? Assume you have a mass of 70.0 kg. b) How far did the elevator drop in 1.20 s?arrow_forwardA parachutist’s fall to Earth is determined by two opposing forces. A gravitational force of 539 N acts on the parachutist. After 2 s, she opens her parachute and experiences an air resistance of 615 N. At what speed is the parachutist falling after 10 s?arrow_forwardA piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but as they walk away, it begins to roll down the ramp. Neglect the friction between the piano and the ramp. If the back of the truck is 1.5 mm above the ground and the ramp is inclined at 26 ∘∘ , how much time do the workers have to get to the piano before it reaches the bottom of the ramp?arrow_forward
- A man pushes an object to the right and exerts a force which has a horizontal compotent of F = 33 N. A horizontal frictional force has a magnitude of f = 15 N which opposed the horizontal component of the fushing force. The mass of the object is m = 31 kg. Write an expression for the magnitude of the acceleration of the object. If the object starts at rest what is the speed in meters per second at t = 2.00s? If the man stops pushing the object at t = 2.00s and the firctional force is constant what is the distance in meters does to object slide before coming to a rest?arrow_forwardA rope, attached to a weight, goes up through a pulley at the ceiling and back down to a worker. The worker holds the rope at the same height as the connection point between the rope and weight. The distance from the connection point to the ceiling is 30 ft. Suppose the worker stands directly next to the weight (.e., a total rope length of 60 ft) and begins to walk away at a constant rate of 2 ft/s. How fast is the weight rising when the worker has walked: 10 feet? Answer= 30 feet? Answerarrow_forwardYou are trying to escape a hoard of zombies and must make an elevator to get down a cliff as fast as possible. As you cannot hit the ground faster than 10m/s and the cliff is 25m deep, this limits your acceleration to 2 m/s2 (you will want to accelerate at this rate to get down the cliff as fast as you can). Assuming your and the bucket’s mass together is 100kg (m2) , what is the minimum mass (m1) that the sled must be to prevent your death (assume the ground is frictionless).arrow_forward
- A 91 kg janitor wearing running shoes is running across an ice rink at a speed of 3.2 m/s. They try to stop abruptly, but keep sliding across the surface of the ice. The ice exerts a frictional force of 13.4 N to slow them down. How far do they travel before halting to a stop?arrow_forwardCarol wants to move her 32kg sofa to a different room in the house. She places "sofa disks", slippery disks with mu k =.080 , on the carpet, under the feet of the sofa. She then pushes the sofa at a steady.4 .4 m/s across the floor. How much force does she apply to the sofa?arrow_forwardA 1500 kg automobile travels at a speed of 105 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop. (a) What will be the car's stopping distance for dry pavement ( = 0.85)? (b) What will be the car's stopping distance for wet pavement ( = 0.60)?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