Answered: A man of mass 75kg runs up a flight of…

A man of mass 75kg runs up a flight of 50 steps in 15 seconds. Calculate the power output, when this leg muscle given ? that vertical height of two step is 0.2m .A 250W .B 245J .C 245W .D 2450W

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 77P: A man of mass 80 kg runs up a flight of stairs 20 m high in 10 s. (a) how much power is used to lift...

See similar textbooks

Related questions

Q: EXAMPLE 23-14 Diverging lens. Where must a small insect be placed if a 25-cm-focal-length diverging…

Q: A ball is thrown straight up is located s feet above the ground at t seconds after it is thrown in…

A: Givens=112 t-16 t2 feet

Q: C1 C2 C3 In the circuit below C1 = 3C, C2=C and C3 =5C. If C=24µF and emf (ɛ) of the battery is 110V…

A: C1=3C C2=C C3=5C Emf(e)=110v

Q: Eight identical charged particles are arranged at the corners of a cube. The particles each have…

Q: Question: If a current of 64 A is running through point a, what is the potential difference between…

A: Given data: Current through point a (I) = 64 A Resistance (R1) = 6.7 Ω Required: Potential…

Q: ) Two-block system is given below. The mass of block one is m, 4 kg and the mass of block two is m,…

Q: Figure (a) shows the basic structure of a human eye. Light refracts into the eye through the cornea…

A: Given:When image was at infinity the focal length of lens isf = 2.56 cmbut since from fig b, it is…

Q: A 23.0-kg file cabinet of is sliding down a frictionless ramp for a distance of 5.00 m as shown. Use…

Q: mass 23.59 • CP A small sphere with 1.50 g hangs by a thread between two very large parallel…

Q: Question: Three identical 5.6 kg spheres are located at 3 of the 4 corners (top left, top right, and…

A: This question is based on the Gravitational Potential energy topic. The Gravitational potential…

Q: Question 4. (a) If a battery with a 0.100 1 internal renistance supplies 15.0 W of total power with…

A: The terminal voltage of a battery is ∆V=ε-IR…

Q: After a fall, a 100 kg rock climber finds himself dangling from the end of a rope that had been 14 m…

A: GivenMass of rock climber, m=100 kgOrignal Length of rope, L=14 mDiameter of rope, D=10 mm=10×10-3…

Q: Lili pulls a 6.00-kg crate across a horizontal floor for a distance of 3.00 m as shown. The tension…

Q: 2.00 kg and a block of 6.00 kg are connected by a massless string over a pulley in the shape of a…

Q: Q) When the patient is unconscious, the specialized doctor gives him nutrients through an…

Q: An object is being acted upon by three forces and moves with constant velocity. One force is 65 N…

A: Given data: Three forces are acting on the object Velocity of the object is constant F1 = 65 N,…

Q: In the Projectile motion experiment, the range (x) of the projectile is related to the initial angle…

Q: Q1) In the wave diagram below Find a) Frequency, b) Time period, & c) Speed of (Ans: 6 Hz; 0.167 s;…

A: Given data: From wave diagram Wavelength (λ) = 5 cm = 0.05 m Number of oscillations = 6 Time (t) =…

Q: A bullet of mass 27.0 grams is shot horizontally into a fong rod with a wooden block of mass 2.00 kg…

A: Option (c) is correct that is 53 degrees.

Q: R1 V1+ R2 ce V2+ R3 If RI = 202, R2 = 120, R3 = 42, V1 = 9V, and V2 = 3V, find the current through…

Q: A ball is thrown vertically upward with a speed of 4.9 m/s. What is the time of the flight?

A: As per guidelines, i am solving first part of question , Please post other question seperately.

Q: ACTIVITY 3: Non-Parallel Forces (Draw the free-body diagram for the meter stick and for mass Make…

A: FBD:-

Q: A planet's moon travels in an approximately circular orbit of radius 5.8 × 107 m with a period of 7…

A: Given Data: The radius of the moon's circular orbit is: r=5.8×107 m The time period is: T=7 h 36…

Q: It must be given these accelerations by the.. since force = mass x .acceleration mass O damped O…

A: Option (d) is correct i.e. spring

Q: The velocity of the three molecules is 2 km s1, 4 km s1, 6 km s 1. Find (i) mean square velocity…

Q: 5.94* A stepped-index multimode glass fiber has indices of 1.481 and 1.461. Its core diameter is 100…

Q: The water molecules now in your body were once part of a molecular cloud. Only about onemillionth of…

Q: 2. Block A in the figure weighs 100 N, p = 0.35 and W = 30 N. The system is in equilibrium. a) Find…

Q: You push a file cabinet up a rough ramp tilted at 10.0° with horizontal at a constant speed of 1.50…

A: Given that:Angle of inclination, θ=15.0°Speed, v=1.50 m/s (constant)Mass, m=30.0 kgForce, F=150…

Q: A block of mass 40 kg.accelerate with the 3 m/s^2 by the horizontal force F and the coefficient of…

A: We know that the newton's second is given as Fnet= ma where m is the mass. a is the acceleration of…

Q: HW: X-ray range of wavelengths is between 108 to 1012. Calculate the energy range of x-ray.

A: To calculate energy range we wil use the formula : E = hc/lambda

Q: Given that, T = k R3. Express the constant k of the above relation in days and kilometres. Given, k…

Q: When a peanut is placed 12.3 cm away from the center of a concave mirror, its image is located 55.1…

Q: Two Planets, A and B, are orbiting a common star. Planet A is twice as massive as planet B and…

A: Kepler's third law It state that square of the time period of the revolution of the planet…

Q: About 32% of the body of a person floating in the Dead Sea will be above the water line. Assuming…

Q: What is the length of a vector having these coordinates: (3, 5,-2) ?

Q: A jumper cable used to start a stalled vehicle carries a 65-A current. How strong is the magnetic…

Q: Assuming the system is cabinet+earth+ramp, which of the energy term is zero Select all apply.

A: Since the file cabinet is sliding down the frictionless ramp there is no frictional force. There is…

Q: . Determine the combined effects of earth’s curvature and atmospheric refraction on a level sight…

A: Dear student, Since both questions are different as per guidelines we can author only first one…

Q: Show that the temperature -40°C is unique in that it has the same numerical value on the Celsius and…

Q: Problem 2: The values for the components of the circuit shown in the figure are V= 12 V, C = 4.2 µF,…

Q: In unit-vector notation, what is the torque about the origin on a particle located at coordinates…

Q: Part A A spring of force constant 240.0 N/m and unstretched length 0.220 m is stretched by two…

A: Given data, Force Constant of the spring (k)=240 N/m Unstretched length of the spring (d)=0.220 m…

Q: A car is moving on a straight road 10.5 m/s. It is acceleration at 22 m/s² . What will be it's…

A: Given data : Acceleration = a Time = t Initial velocity = u To find :…

Q: The moment of inertia of a body about a given axis is 1.2 kgm2. initially, the body is at rest. For…

Q: 20. A long, straight wire allows 3.50 A through it. What is the magnitude of the magnetic field 25.0…

Q: 7. Two blocks with masses 4.00 kg and 8.00 kg are connected by a string and slide down a 30.00…

Q: 12 zettameter is equivalent to 1.2x10"m. What should be the value for x?

A: Zetta stands for sextillion or 1 with 21 zeros, used to measure distance.

Q: 1. A steel wire of length 4.7 m and cross section 3.0 x 10 m2 stretches by the same amount as a…

Q: One of King Hiero's crowns was found to have a weight of 13N in air. What is its specific gravity if…

A: Specific gravity of object is the ratio of density of that object to the density of water. specific…

Question

A man of mass 75kg runs up a flight of 50 steps in 15 seconds. Calculate the power output, when this leg muscle given ?
that vertical height of two step is 0.2m
.A
250W
.B
245J
.c
245W
.D
2450W

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time: (a) How many people ‘would it take to nm a 4.O0-kW electric clothes dryer? (b) How many people would it take to replace a large electric power plant that generates 800 MW?
Integrated Concepts (a) What force must be supplied by an elevator cable to produce an acceleration of 0.800 m/s2 against a 200-N frictional force, if the mass of the loaded elevator is 1500 kg? (b) How much work is done by the cable in lifting the elevator 20.0 m? (c) What is the final speed of the elevator if it starts from rest? (d) How much work went into thermal energy?
(a) How long will it take an 850-kg car with a useful power output of 40.0 hp (1hp=746W) to reach a speed of 15.0 m/s, neglecting friction? (b) How long will this acceleration take if the car also climbs a 3.00-m-high hill in the process?
A 500-kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is its average power output in watts and horsepower if this takes 7.30s?
A force F = (6i 2j) N acts on a panicle that under-goes a displacement r = (3i + j) m. Find (a) the work done by the force on the particle and (b) the angle between F and r.
Integrated Concepts (a) Calculate the force the woman in Figure 7.46 exerts to do a push-up at constant speed, taking all data to be known to three digits. (b) How much work does she do if her center of mass rises 0.240 m? (c) What is her useful power output if she does 25 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans. Figure 7.46 Forces involved in doing push-ups. The woman's weight acts as a force exerted downward on her center of gravity (CG).
Check Your Understanding Repeat Example 8.10 when the particle’s mechanical energy is +0.25 J.
A 6.50 102-kg elevator starts from rest and moves upward for 3.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. (a) What is the average power of the elevator motor during this period? (b) How does this amount of power compare with its power during an upward trip with constant speed?
Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work.
What average power is generated by a 70.0-kg moun-tain climber who climbs a summit of height 325 in in 95.0 min? (a) 39.1 W (b) 54.6 W (c) 25.5 W (d) 67.0 W (e) 88.4 W
(a) How fast must a 3000-kg elephant move to have the same kinetic energy as a 65.0-kg sprinter running at 10.0 m/s? (b) Discuss how the larger energies needed for the movement of larger animals would relate to metabolic rates.
(a) Find the useful power output of an elevator motor that lifts a 2500-kg load a height of 35.0 m in 12.0 s, if it also increases the speed from rest to 4.00 m/s. Note that the total mass of the counterbalanced system is 10,000 kg—so that only 2500 kg is raised in height, but the full 10,000 kg is accelerated. (b) What does it cost, if electricity is $0.0900 per kW h?