Learning Materials
Features
Discover
Chapter 8: Q94P (page 210)
The luxury liner Queen Elizabeth 2 has a diesel-electric power plant with a maximum power of92 MWat a cruising speed of 32.5 knots. What forward force is exerted on the ship at this speed?(1 knot = 1.852 km / h).
The forward force exerted on the ship at speed.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
A snowball is fired from a cliff high. The snowball’s initial velocity is , directed above the horizontal. (a) How much work is done on the snowball by the gravitational force during its flight to the flat ground below the cliff? (b) What is the change in the gravitational potential energy of the snowball-Earth system during the flight? (c) If that gravitational potential energy is taken to be zero at the height of the cliff, what is its value when the snowball reaches the ground?
A worker pushed a 27 kgblock9.2 malong a level floor at constant speed with a force directedbelow the horizontal. If the coefficient of kinetic friction between block and floor was 0.20, what were (a) the work done by the worker’s force and (b) the increase in thermal energy of the block– floor system?
The temperature of a plastic cube is monitored while the cube is pushed 3.0 macross a floor at constant speed by a horizontal force of 15 N. The thermal energy of the cube increases by 20 J. What is the increase in the thermal energy of the floor along which the cube slides?
A 50 gball is thrown from a window with an initial velocity of 8.0 m/sat an angle ofabove the horizontal. Using energy methods, determine (a) the kinetic energy of the ball at the top of its flight and (b) its speed when it is 3.0 mbelow the window. (c)Does the answer to part (b) depend on either (c) the mass of the ball or (d) the initial angle?
In Fig. 8-25, a block slides along a track that descends through distance h. The track is frictionless except for the lower section. There the block slides to a stop in a certain distance Dbecause of friction. (a) If we decrease h, will the block now slide to a stop in a distance that is greater than, less than, or equal to D? (b) If, instead, we increase the mass of the block, will the stopping distance now be greater than, less than, or equal to D?
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Exams 
GCSE 
IGCSE 
AS 
A Level 
International A Level 
University Admissions Tests 
Flashcards 
Vaia AI 
Notes 
Study Plans 
Study Sets 
Find a job 
Find a degree 
Student Deals 
Magazine 
Mobile App