A) The Queen Elizabeth 2 The luxury liner Queen Elizabeth 2 has a diesel-electri

Question

A) The Queen Elizabeth 2 The luxury liner Queen Elizabeth 2 has a diesel-electric powerplant with a maximum power of 93 MW at a cruising speed of 32.0 knots. What forward force is exerted on the ship at this speed? (1 knot = 1.852 km/h.)

B)Work Done by 2-D Force What work is done by a force = ((3 N/m)x) + (3 N), with x in meters, that moves a particle from a position 1 = (2 m) + (3 m) to a position 2 = - (4 m) - (3 m)?


C)Crate on an Incline To push a 20.0 kg crate up a frictionless incline, angled at 16.0° to the horizontal, a worker exerts a force of magnitude 200 N parallel to the incline. The crate slides 1.45 m.
What is the total work done on the crate?
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Explanation / Answer

A) Given that the power of the power plant is P = 93 MW                                                                           P = 93x106 W Cruising speed is v = 32.0 knots = 32.0*1.852 km/h                                                          = 59.264 km/h                                                          = 16.462 m/s If the ship moving with constant speed, the power related to velocity as                      P = F v                      F = P / v                         = ( 93x106 W) / (16.462 m/s)                         = 5.65x106 N                                                                                          

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