Swordfish are capable of stunning output power for short bursts. A 650 kg swordfish has a cross-section area of 0.92 m2 and a drag coefficient of 0.0091—exceptionally low due to a number of adaptations. Such a fish can sustain a speed of 30 m/s for a few seconds. Assume seawater has a density of 1026 kg/m3. What is the specific power for motion at this high speed?

Q: A 1.00 m long rod weighing 300 g hangs from the ceiling. For how much does its potential energy…

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Q: A champion athlete can produce one horsepower (746 W) for a short period of time. If a 70-kg athlete…

A: To go to the top of a 254 m highmountain, the athlete needs to gaina potential energy = mgh⇒P>E =…

Q: 16. A diesel-powered crane (mc = 2.93 x 10° kg) is lifting a heavy block of concrete mb = 8.44 x 104…

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Q: When 150 J of work is done on a system by and external force of 15 N in 20. seconds, the total…

A: The work done on the system is 150 J by the external force force of 15 N is 20 sec.

Q: A block of mass m = 331 g is dragged with a string across a rough horizontal table. The string…

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Q: A 2-kg car initially moving at 6 m/s at a height of 4 m encounters a hill of height 5 m, as shown in…

A: Solution: Given that m = 2 kg v = 6 m/s spring constant k = 150 N/m

Q: A 64 kg human sprinter can accelerate from rest to 10 m/sm/s in 3.2 s . During the same time…

A: P=∆E∆t=0.5mv2f-v2i∆t

Q: A 2-kg car initially moving at 6 m/s at a height of 4 m encounters a hill of height 5 m, as shown in…

A:

Q: 2-kg car initially moving at 6 m/s at a height of 4 m encounters a hill of height 5 m, as shown in…

A:

Q: What average power would a 1500 kg speedboat need to go from rest to 25 m/s in 6 seconds if the…

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Q: Football players measure their acceleration by seeing how fast they can sprint 40 yards (37 m). A…

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Q: *The 3,000lb race car is up and running again and slides into a wall at 150mph. What is the kinetic…

A: A body is said to be possessing kinetic energy if it has a velocity. The higher the velocity of the…

Q: if an 80 kg sprinter can accelerate from a standing start to a speed of 10 m/s in 3 s, what average…

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Q: A 72.0 kg swimmer jumps into the old swimming hole from a tree limb that is 3.45 m above the water.…

A:

Q: What average power is needed to lift a 65-kg vendor vertically upward at a uniform speed of 0.44…

A:

Q: What is its kinetic energy at the low point? (You must provide an answer before moving to the next…

A: Given data:  Mass (m) = 0.15 kg Velocity (v) = 9 m/s Required: Kinetic energy (KE)

Q: A 135g Frisbee is thrown from a point 1.05 m above the ground with a speed of 12.00 m/s. When it has…

A: Given m=135g H1=1.05m H2=2.50m V1=12.00m/s V2=10.4831m/s   Work done on the Frisbee can be defined…

Q: 11. Jam consumes 8.4 x 10^6 J of energy per day while maintaining a constant weight. What is the…

A: Given:- Jam consumes 8.4 x 106 J of energy per day while maintaining a constant weight Find:- What…

Q: As the driver steps on the gas pedal, a car of mass 1 160 kg accelerates from rest. During the first…

A: Given data: The acceleration a of the car increases with time t as, Mass of the car is m= 1160 kg…

Q: A 1.5 Kg ball at initial altitude of 0.0 m is trough upward with an initial speed of 10.0 m/s What…

A: Given data:  Mass (m) = 1.5 kg Initial altitude (h) = 0.0 m Initial Speed (v) = 10.0 m/s Required:…

Q: If 30,000 J of work is done on a 2400 kg box that started from rest, what is the final velocity of…

A:

Q: 11. A ball weighing 20 N is dropped from rest from a height of 8 meters above the ground. Assuming…

A: Total mechanical energy is the sum of kinetic energy and potential energy.

Q: While training for a dog show, a 3.8 kg dog does 32 pushups in a minute, displacing its center of…

A:

Q: Q45) A 8 kg box is moving horizontally at 6 m/s. To change its speed to 10 m/s, the net work done on…

A: Given a box of mass m=8 kg which is moving horizontally with a velocity of v1= 6 m/sec. Its speed is…

Q: A pitcher bestows a power of P = 206 W to a baseball of mass m = 0.095 kg for a period of t = 0.28…

A:

Q: A 2kg steel sphere is dropped from a height ʼn and, when it hits the ground, its kinetic energy is…

A:

Q: A 65.00-kg runner begins her exercise by moving with a velocity of 2.50 m/s. She then runs up a…

A: Kinetic energy is given by,  KE=12mv2 Potential energy is given by , PE=mgh Given : Mass m=65 kg…

Q: A box of unknown mass is sliding with an initial speed v₁ = 4.30 m/s across a horizontal…

A: Intial velocity of box = 4.3m/s Rough section of floor=2.8m Coefficient of kinetic friction=0.1 Let…

Q: A belicopter with mass m 3250 kg is cruising at a speed of 56.9 m/s at an altitude of 185 m. What is…

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Q: During running, the velocity of blood flow is about (100 cm / s) in the aorta. What is the kinetic…

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Q: Suppose you are driving in the High Sierras from Mammoth Mountain to the Owens Valley 2012 m below.…

A: Required : The approximate final speed.

Q: The Grand Coulee Dam is 1270 m long and 170 m high. The electrical power output from generators at…

A: Solution: Determine the electric power produced per cubic meter of water due to potential energy.…

Q: A box with mass 1.78 kg is being pulled across a rough surface with a coefficient of kinetic…

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Q: A 169 N weight elevator carries 20 passengers, which have an average weight of 710 N, a distance of…

A:

Q: A 50.0 kg extreme snowboarder slides down the side of a mountain that is inclined at an angle of…

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Q: What average power is needed to lift a 65-kg vendor vertically upward at a uniform speed of 0.44…

A: Given: The mass (m) of the vendor is 65 Kg. The uniform velocity (v) of the vendor is 0.44 m/s.…

Q: A 55.0 g tennis ball was hit by a racket at an angle of 34.9° above the horizontal and travel a…

A:

Q: A 700 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a…

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Q: The loaded cab of an elevator has a mass of 1.40 × 10° kg and moves 246. m up the shaft in 21.0 s at…

A: The rate of the doing of the work done by the force at a given instant is called instantaneous power…

Q: When an automobile is traveling at 60 km/hr, its engine is developing 25 hp. a) Find the total…

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Q: What is the average power output of a 55.0 kg woman who does 50 deep knee bends in which her center…

A: The expression for the output power is,

Q: What is the kinetic energy of a 146.7 g baseball thrown at 49.8 m/s at a height of 114 m? Use g=9.8

A: Mass = m = 146.7 g = 146.7 × 10-3 kg Initial speed =v0 = 49.8 m/s Height = h = 114 m K.E. at h =?

Q: A 1500 kg sports car accelerates from rest to 95 km/h in 7.0 s What is the average power delivered…

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Q: A pump lifts water at the rate of 6 m^3/s to a height of 120 m and the friction loss in the pipe is…

A: