The aircraft carrier USS George Washington has mass 1.0 ×108kg. When its engines are developing their full power of 260,000 hp, the George Washington travels at its top speed of 35 knots ( 65 km/h).   If 68 % of the power output of the engines is applied to pushing the ship through the water, what is the magnitude of the force of water resistance that opposes the carrier’s motion at this speed?

Q: An electric elevator with a motor at the top has a multistrand cable weighing 5.5 lb/ft. When the…

A: Given: Weight of the cable= 5.5 lb/ft Total length of the cable =130 ft              To calculate,…

Q: What is the maximum velocity at which a 25 W motor can lift an 8.5 kg object upward

A: Given that:- P=25 Wm=8.5 kgg=9.8 m/s2V=?   Since, P=mgV

Q: A speed boat requires 61 kW to move at a constant speed of 28 m/s. What is the resistive force in…

A:

Q: What average power does a 1,565 kg car need to go from 0 to 12.6 m/s in 6.86 seconds? Assume a…

A:

Q: Your job is to lift 30-kg crates a vertical distance of 0.90 m from the ground onto the bed of a…

A:

Q: A 618-kg elevator starts from rest and moves upward for 3.10 s with constant acceleration until it…

A: Given Data: The mass of an elevator is, m=618 kg The time required to move upward is, t=3.10 s The…

Q: A tractor tows a plane from its airport gate, doing 8.8 MJ of work. The link from the plane to the…

A:

Q: helicopter lifts a 80 kg astronaut 17 m vertic (a) How much work is done on the astr (b) How much…

A: GivenMass of Astronaut, m=80 kgDistansed moved vertically, d=17 mAcceleration of Astronaut, a=g10

Q: A person carries a 50 kg object up a flight of stairs. There are ten stairs; each step is 30 cm high…

A:

Q: A 4878-kg car is driving down a portion of highway that is inclined 10° with respect to the…

A: According to question---- Given data-- Mass of car (m) = 4878 kg. Incline angle = 10 degree…

Q: A plane weighing 241 kN (24.6 tons) lands on an aircraft carrier. The plane is moving horizontally…

A: Given : Weight of the plane, m = 241 kN Horizontal speed of the plane, vh = 68.3 m/s The plane stops…

Q: The engine of a Honda Civic has a power of 1.32 x 105 W (176.88 hp).   a) How much work does this…

A: Power is defined as the energy transferred per unit time. Since this energy is consumed in work…

Q: A child pulls on a wagon with a force of 75 N. If the wagon moves a total of 30 m in 2.0 min, what…

A: Given , Force = 75 N Displacement s = 30 m Time = 2 minutes

Q: A teenager is taking a 'Bird' scooter out for a joyride. He decided he wants to take the scooter to…

A: Given- mass of boy , m= 65 kg  Height of hill , h = 30 m As boy starts from rest , hence his initial…

Q: One boat tows another boat by means of a tow line, which is under a constant tension of 465 N. The…

A: Given data: Tension force (F) = 465 N Velocity (v) = 4.60 m/s Time (t) = 1.10 min Required: The work…

Q: A curling stone has a mass of 18.0 kg. The stone begins initially at rest on a flat ice surface. It…

A: Given data:  Mass (m) = 18.0 kg Constant Force (F) = 24.0 N Distance (d) = 4.00 m Required: The…

Q: A speed boat requires 63 kW to move at a constant speed of 12.m/s. What is the resistive force in…

A: Power, P = 63 kW = 63000 W Speed, v = 12 m/s   The power of the speed boat is given by  Power =…

Q: In 2.69 minutes, a ski lift raises four skiers at constant speed to a height of 134 m. The average…

A:

Q: A hummingbird hovers by exerting a downward force on the air equal, on average, to its weight. By…

A: Formula to calculate the average power is

Q: A hummingbird hovers by exerting a downward force on the air equal, on average, to its weight. By…

A:

Q: A 1300-kg elevator carries a maximum load of 750 kg. A constant frictional force of 3000 N retards…

A:

Q: An electric motor is rated to have a maximum power output of 0.67 hp. If this motor is being used to…

A:

Q: Jamie is babysitting three children. She expends 500 J of energy while applying 100 newtons of force…

A:

Q: A 64.0 kg cheetah accelerates from rest to its top speed of 32.5 m/s. (a) How much net work (in J)…

A: (a) According to the work energy theorem, W=∆K=12mv2-12mu2=12mv2-u2 Substitute the values, to find…

Q: A crane lifts a load of 6000 N through a vertical distance of 15 m in 30 s.What is the average…

A:

Q: A 1631-kg car coasts in neutral down a 2.00 degree hill. The car attains a terminal speed of 20.0…

A:

Q: Suppose that as part of their training, the football players of Central Luzon State University went…

A:

Q: What average mechanical power (in W) must a 70.5 kg mountain climber generate to climb to the summit…

A: The expression for the average mechanical power (P) is,

Q: 6 kg object is launched straight up. When it is 100 m high it has a speed of 40 m/s. What is the…

A:

Q: What average mechanical power (in W) must a 61.5 kg mountain climber generate to climb to the summit…

A: According to work energy theorem, the work required to climb the hill is,Substitute the values,

Q: A hummingbird hovers by exerting a downward force on the air equal, on average, to its weight. By…

A: Work in each stroke,