Power of the Human Heart. The human heart is a powerful and extremely reliable pump. Each day it takes in and discharges about 7500 L of blood. Assume that the work done by the heart is equal to the work required to lift this amount of blood a height equal to 1.6 m. The density (mass per unit volume ) of blood is 1050 kg / (m ^ 3) What is the heart's power output . Use g =; 9.8 m/s ^ 2 Calculate answer to one decimal .

Q: An engine is being used to raise a 89.0 kg crate vertically upward. If the power output of the…

A: Given: mass of crate, m = 89 kg power output of the engine, P = 1620 W vertical distance, h = 18.7 m

Q: As part of a charity fund raising drive, a runner with mass 50.0 kg runs up the stairs to the top of…

A: Mass of the runner=50kgHeight=443macceleartion due gravity=g=9.8m/s2Increase in potential…

Q: A machine carries a 8.0 kg package from an initial position of d ; = (0.6 m) i + (0.79 m)j + (0.26…

A: Given: di=0.6m i^ + 0.79m j^ + 0.26m k^df=10.5m i^ + 15.0m j^ + 10.2m k^∆t = 15 sF = 4.0N i^ +7.0N…

Q: A skier of mass 65 kg is pulled up a slope by a motor-driven cable. (a) How much work is required…

A: Given:-  mass of the skier m= 65 kg  height h= 85 m  slop is θ=30° The speed of the skier is v= 2.2…

Q: 8. MA block of mass m = F 2.50 kg is pushed a dis- tance d = 2.20 m along a %3D frictionless…

A:

Q: 9 A box moves on a frictionless horizontal surface under the influence of the two forces = F₁ = (50î…

A: Power = It is the dot product of force vector to the velocity vector.

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: Q.4. A block of mass m = 0.25 kg is dropped onto a relaxed vertical spring of spring constant k =…

A:

Q: A cable exerts a constant upward tension of magnitude 2.54 × 10“ N on a 2.40 x 10° kg elevator as it…

A: Work done=FdcosθF is tension force=2.54×104 Nd is vertical distance=3.10 mθ is angle between force…

Q: An accelerating object of mass m=2 kg is fired with an initial speed v=8 m/s at a starting point. If…

A: Given data: Mass m =2 kg Velocity v=8 m/s2. Final Kinetic energy =268 J

Q: SQU is trying a new particle accelerator design with a mechanical component using a spring that does…

A: Given:  Force, F = 58.6 x4 + 7.2 x2 From x = 0.6 m to 1.8 m  m = 5.2 kg

Q: Estimate the work (in J) you do to mow a lawn 20 m by 20 m with a 60-cm-wide mower. Assume you push…

A: in this question  we use simple work equation.

Q: A man produces a power output P as he lifts a weight of 200 newtons to height H in time T. If a…

A: Given : F = 200 newtons

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

A:

Q: A force F = (2.5 + 8.4j + 6.4k) N acts on a 3.6kg object that moves in 2.3s from an initial position…

A:

Q: What is the work required to raise a 200 kg barbell to a height of 1.25 m? From the problem, what is…

A: Given data:  Mass (m) = 200 kg Height (h) = 1.25 m Required: Force (F)

Q: A pump lifts 260 kgof water per hour a height of 5.5 m . What is the minimum necessary power output…

A: Calculate the mass flow rate in per second. Mass flow rate = (260 kg/hr)(1 hr/3600 s)…

Q: A top fuel dragster with a mass of 600.0 kg starts from rest and completes a quarter mile (402 m)…

A: Given: mass of top fuel dragster, m = 600 kg Initial speed, u = 0 (starting from the rest) Final…

Q: It takes 1.09 J of work to compress a spring 11.1 cm. What is the force constant of the spring in…

A:

Q: An accelerating object of mass m=17 kg is fired with an initial speed v-8 m/s at a starting point.…

A:

Q: A 5.40-kg box rests on a horizontal surface. The coefficient of kinetic friction between the box and…

A:

Q: An engineering student wants to use a light, porous material of density 600 kg/m3 to construct a…

A: Given data The density of the porous material is ρ = 600 kg/m3 The height of the tower is ho = 5 m…

Q: As a part of a charity fund-raising drive, a marathon runner with mass of 75 kg runs up the stairs…

A: Work done required for mass m to climb height h will be against gravity. Wreq = mgh we Also know,…

Q: How much total mechanical work does a weightlifter do in 10 repetitions of lifting (and lowering)…

A: Total mechanical work is change in potential energy. In this question after 10 repetitions of…

Q: Which of the following statements about energy is not true?   a. The mechanical energy of a…

A: The mechanical energy of a physical system is constant when the forces acting on the system are all…

Q: A grade 12 student lifts their 55 kg body 125 cm off the ground with one arm in 5 seconds. How much…

A:

Q: Solve for the weight component (N), work done by applied force (J), and work done by weight…

A:

Q: The drawing shows a boat being pulled by two locomotives through a canal of length 3.50 km. The…

A:

Q: An engine uses 20000 N of force to power a car at an average speed of 5.0 m/s. What is the average…

A: POWER =FORCE×VELOCITY

Q: The loaded cab of an elevator has a mass of 4.70 x 10° kg and moves 233. m up the shaft in 21.0 s at…

A: Given: The mass of the elavator is 4.7x103 kg. The displacement of the elevator is 233 m vertically.…

Q: A 2.80-kg object has a velocity (6.20 î - 2.40 ĵ) m/s. (Note: From the definition of the dot…

A:

Q: 19. If a ski lift raises 100 passengers averaging 660 N in weight to a height of 150 m in 60.0 s, at…

A: average weight of a passenger= 660 N Total weight lifted= 100×660= 66000 N Height H= 150 m time…

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 farmer is using a rope and pulley to lift a bucket of water from the bottom of a well that is hy =…

A: Given:The depth of the well is 9.5 m. The force is 59.5 N. The total mass is 3.1 kg.

Q: How much total mechanical work does a weightlifter do in 10 repetitions of lifting (and lowering)…

A:

Q: A force É = (4.40 N) î + (3.00 N)ĵ+ (1.80 N) k acts on a 5.40 kg mobile object that moves from an…

A: Using the force and work done relation to solve the problem

Q: Suppose that as part of their training, the football players of Luzon went up a stair in 66 s.…

A:

Q: 6m/s d=10m 2m/s 37 A 1000kg car moves up an incline with initial speed 2m/s, it reach the top of the…

A:

Q: 1. A man carries a load of 500 N to a distance of 100 m. The work done by him is B. 50,000 Nm C.0 D.…

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

Q: The work done by gravity during the descent of a projectile is: a) negative b) zero c) positive d)…

A: Let an object of mass m be in descent so force applied by gravity is F=mg. Direction of F here is…

Q: A machine carries a 3.5 kg package from an initial position of d, = (0.50 m)i + (0.75 m)j + (0.20…

A:

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: 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: A 80 g particle is moving to the left at 29 m/s. How much net work must be done on the particle to…

A:

Q: A machine carries a 4.5 kg package from an initial position of d, - (0.50 m)î + (0.75 m)î + (0.20…

A: The work done by a force to move a body by a certain distance is given by W = F.s, where F = the…

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:

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.