Swordfish are capable of stunning output power for short bursts. A 650 kg swordfish has a cross-sectional area of 0.92 m2 and a drag coefficient of 0.0091- very low due to some evolutionary 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 . a) What is the specific power for motion at this high speed? b) How many horsepower is that?

Q: A certain car has a drag coefficient of 0.32. If you look at it from the front, the car’s cross…

A: Expression for power -  P=Fv Where,  F = Force  Expression for force in terms of density and…

Q: A 111 kg seal at an amusement park slides from rest down a ramp into the pool below. The top of the…

A: mass of seal (m)= 111 kg Initial height (h) = 1.90 m θ = 26.5oInitial velocity (u) = 0 msfinal…

Q: A 7.80-g bullet moving at 690 m/s penetrates a tree trunk to a depth of 6.20 cm. (a) Use work and…

A: Mass of bullet (mb)=7.8 g Initial speed of the bullet (u)=690 m/s Penetration in trunk (d)=6.2 cm

Q: Q 15) Duningjogging the velocity of blood flow is about (cm/s (10) inthe aorta, what is the kinetic…

A:

Q: During the Powerhouse lab, Gab runs up the stairs, elevating his 98 kg body a vertical distance of 3…

A: Given: The mass of the object is 98 kg. The vertical distance covered by the object is 3 m. The time…

Q: A 7.80-g bullet moving at 575 m/s penetrates a tree trunk to a depth of 5.50 cm. (a) Use work and…

A: Given, Mass of bullet m = 7.8 g= 0.0078 kg  Speed of Bullet v = 575 m/s Distance penetrated d = 5.5…

Q: 6. A standard baseball has around 146 g. If a ball comes off a bat with 30 W of kinetic energy, how…

A: Note: The unit of kinetic energy mentioned in the question is incorrect, considering the unit of…

Q: A 45.0 kg student climbs a 5.45 m long rope and stops at the top. What must her average speed be to…

A: The work done by the student is equal to the change in gravitational potential energy. Hence,  W=mgh…

Q: A dam collects water at a height of 300 m. The water can be let down through a pipe. As it falls to…

A:

Q: A box is given a push across a horizontal surface. The box has a mass m, the push gives it an…

A: The friction force can be given as, Ff=-μmgma=-μmga=-0.119.8 m/s2=-1.078 m/s2 Use the equation of…

Q: ome runners train with parachutes that trail behind them to provide a large drag force. These…

A: Given: Side of a square shaped expansion of parachute a = 1.8 m. Drag Coefficient CD=1.4 Velocity of…

Q: A 0.6 kg box moves up a ramp with some initial speed. It reaches a vertical height of 3.5 m before…

A: Solution: Given: m = mass of box = 0.6 kg g = gravitational acceleration = 10 m/s2 h = height of…

Q: A box m=73 kg is being pulled by a constant force F=187 newtons at an angle of 29 degrees. The…

A: Given data The mass of the box is m = 73 kg The magnitude of the constant force is F = 187 N The…

Q: The figure below shows a person pushing a box with a force of 8.2 N over a displacement of 8.7 m.…

A: Given that:- Force(F)=8.2 N    and Displacement(d)=8.7 m Time(t)=5.0 s Work…

Q: The figure shows a system of point loads and from this you want to form an equilateral triangle from…

A:

Q: A leaky bucket which initially has 20 L of water and leaks at a constant rate is hanging from a 60 m…

A:

Q: 7. An overhead tank containing 1,500 L of water is placed on top of the roof of a building. The…

A: The mass of water in the tank is given as, m=1500 L (or) m=1500 kg. The height of the building is…

Q: A sled of mass m is given a kick on a frozen pond. The kick imparts to the sled an initial speed of…

A:

Q: The velocity of an object with mass m-2kg is given as a function of time: V= (2t +1)2+(t) where V is…

A:

Q: A 150 kg yak has an average power output of 120 W. How long can a yak climb a 1.2 km high mountain?

A: Given, Mass of the yak (m) = 150 kg  Power output (p) = 120 Watt. Height of the mountain (h)= 1.2 km…

Q: of the cart at each of the following po A: The bottom of the first hill B: The top of the second…

A: Conservation of Energy According to the law of conservation of energy, the total mechanical energy…

Q: A 7.80-g bullet moving at 660 m/s penetrates a tree trunk to a depth of 5.80 cm. (a) Use work and…

A:

Q: A 45 kg athlete runs up a flight of stairs in 4 s. His net upward displacement is 9 m. What average…

A:

Q: Bob drives a 3500kg truck off a cliff at an initial speed of 11m/s. The truck hit the bottom of the…

A: Answer Truck initial speed u = 11 m/s Truck mass m = 3500 kg  Truck final speed v = 18m/s

Q: A motor pumps 500 kg of water at a constant speed from street level to a height of 30 m to fill a…

A:

Q: A 10 cm-long spring is attached to the ceiling. When a 1.7 kg mass is hung from it, the spring…

A: Mass of the object, Natural length of spring  = 10 cm length of spring after stretch = 16 cm

Q: Jorge wants to lift a large box of mass 50 kg from the floor to his apartment, which is at a height…

A: Given data The mass of the box is m = 50 kg. The height Jorge wants to lift is s = 20 m. a) The…

Q: The mechanical power of a cyclist pedaling at a constant speed of 7.5 m / s is 152 W. d) what is…

A: Power  P = F.v  Since, F=v(dm/dt)  P = v2(dm/dt)

Q: A 2.5 kg rock is released from rest at the surface of a pond 1.8m deep. As the rock falls, a…

A:

Q: A 7.80-g bullet moving at 500 m/s penetrates a tree trunk to a depth of 5.60 cm. (a) Use work and…

A: Given, Mass of bullet m = 7.80 g = 7.80 x 10-3 Kg Initial velocity u = 500 m/s Distance d = 5.60 cm…

Q: A shooting star is a meteoroid that burns up when it reaches Earth’s atmosphere. Many of these…

A: Kinetic Energy = 0.5 m v2

Q: 13. A block launched at Figure P9.13 speed v down an in- cline slides down the incline (there is…

A: solution: The block is sliding along the incline rough plane. As the plane is rough there is a loss…

Q: a.Ladders must be positioned at a safe angle to avoid potential fall hazards when climbing. An ideal…

A: When a ladder is leaned against a wall, the bottom of the ladder should be one fourth of the…

Q: In calculating the work W necessary to stretch a spring from its natural length of 8 centimeters to…

A: SOlution: To calculate the work done on spring to stretch.

Q: A 7.80-g bullet moving at 610 m/s penetrates a tree trunk to a depth of 5.40 cm. (a) Use work and…

A:

Q: A leaky 10-kg bucket is lifted from the ground to a height of 12 m at a constant speed with a rope…

A:

Q: Work And Energy True or False 1. True or False Only the net force acting on an object can do work.…

A: Disclaimer:“Since you have asked multiple question, we will solve the first question for you. If…