EBK PHYSICS FOR SCIENTISTS AND ENGINEER
6th Edition
ISBN: 9781319321710
Author: Mosca
Publisher: VST
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Chapter 1, Problem 42P
To determine
The dimension of power by combining the force and one other physical quantity.
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To get a feeling of the concepts of power and energy, let us look at the power andenergy generated by the human body. In 1994, the Spanish cyclist MiguelIndurain set a world hour record of 53,040 metres in 1 hour. Spanish scientistsmeasured an average power of 509.5 watts produced by him during that hour.What is the energy generated by him in that hour expressed in kWh?
A person used 60 W of power to carry a 55 N box up a 5 m ladder. How long did it take him to do this?
Determine the power in horsepower (HP) that a person weighing 189 pounds develops to climb a ladder 3.0 meters high in a time of 6.3 seconds. Write the answer using two significant figures.
Chapter 1 Solutions
EBK PHYSICS FOR SCIENTISTS AND ENGINEER
Ch. 1 - Prob. 1PCh. 1 - Prob. 2PCh. 1 - Prob. 3PCh. 1 - Prob. 4PCh. 1 - Prob. 5PCh. 1 - Prob. 6PCh. 1 - Prob. 7PCh. 1 - Prob. 8PCh. 1 - Prob. 9PCh. 1 - Prob. 10P
Ch. 1 - Prob. 11PCh. 1 - Prob. 12PCh. 1 - Prob. 13PCh. 1 - Prob. 14PCh. 1 - Prob. 15PCh. 1 - Prob. 16PCh. 1 - Prob. 17PCh. 1 - Prob. 18PCh. 1 - Prob. 19PCh. 1 - Prob. 20PCh. 1 - Prob. 21PCh. 1 - Prob. 22PCh. 1 - Prob. 23PCh. 1 - Prob. 24PCh. 1 - Prob. 25PCh. 1 - Prob. 26PCh. 1 - Prob. 27PCh. 1 - Prob. 28PCh. 1 - Prob. 29PCh. 1 - Prob. 30PCh. 1 - Prob. 31PCh. 1 - Prob. 32PCh. 1 - Prob. 33PCh. 1 - Prob. 34PCh. 1 - Prob. 35PCh. 1 - Prob. 36PCh. 1 - Prob. 37PCh. 1 - Prob. 38PCh. 1 - Prob. 39PCh. 1 - Prob. 40PCh. 1 - Prob. 41PCh. 1 - Prob. 42PCh. 1 - Prob. 43PCh. 1 - Prob. 44PCh. 1 - Prob. 45PCh. 1 - Prob. 46PCh. 1 - Prob. 47PCh. 1 - Prob. 48PCh. 1 - Prob. 49PCh. 1 - Prob. 50PCh. 1 - Prob. 51PCh. 1 - Prob. 52PCh. 1 - Prob. 53PCh. 1 - Prob. 54PCh. 1 - Prob. 55PCh. 1 - Prob. 56PCh. 1 - Prob. 57PCh. 1 - Prob. 58PCh. 1 - Prob. 59PCh. 1 - Prob. 60PCh. 1 - Prob. 61PCh. 1 - Prob. 62PCh. 1 - Prob. 63PCh. 1 - Prob. 64PCh. 1 - Prob. 65PCh. 1 - Prob. 66PCh. 1 - Prob. 67PCh. 1 - Prob. 68PCh. 1 - Prob. 69PCh. 1 - Prob. 70PCh. 1 - Prob. 71PCh. 1 - Prob. 72PCh. 1 - Prob. 73PCh. 1 - Prob. 74PCh. 1 - Prob. 75PCh. 1 - Prob. 76PCh. 1 - Prob. 77PCh. 1 - Prob. 78P
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- Two physical quantities a and b are added together, and the sum of two vectors is, as shown in the figure. Which quantity could be represented by the two vectors? Speed Power Velocity Kinetic energyarrow_forwardA new conveyor system at the local packaging plan will utilize a motor-powered mechanical arm to exert an average force of 890 N to push large crates a distance of 12 meters in 22 seconds. What is the power output required of such a motor.arrow_forwardIf a force of 1000 N moves a 40-m object in a time of 5.0, find the power generated by this force. Use proper formulas to solve this question.arrow_forward
- A box is lifted vertically 32.63 m and is then held there. The box has a weight of 17.92 N. Ignoring friction. How much work done in holding the box in this elevated position? No unit is required for the final answer. Round your answer to 0 decimal places.arrow_forwardDetermine the amount of work, in Joules, done to lift a 500 kilogram piano 4 meters above the ground. We will use a 5 meters long cable with an additional 5 meters to secure the piano. The cable has a linear mass density of 5 kg/m.arrow_forwardPerson B does twice the work of person A, and in one-half of the time . How does the power output of person B compare to person A? Person B has the same power output as person A. Person B has twice the power output of person A. Person B has four times the power output of person A. Person B has half the power output of person A. Person B has eight times the power output of person A.arrow_forward
- A jeepney was pushed with a force of 1447 N at a distance of 121.6 m. It took them 676.2 secs to do the task. Determine the power in this scenario.arrow_forwardA man climbs onto a wall that is 7.76 m high and gains 1723.8 J of potential energy. What is the mass of the man? No unit is required for the final answer. Round your answer to 0 decimal places.arrow_forwardplease help with this questionarrow_forward
- Calculate the power required to raise a 20kg object to a height of 10m in 1 minute.What assumptions, if any, do you need to make to solve this problem?arrow_forwardHow do I set this problem up? What average power does a weightlifter need to lift 225 lb a distance of 4 ft in 1.0 s?arrow_forwardTwo construction cranes are used to lift identical 1200-kilogram loads of bricks the same vertical distance. The first crane lifts the bricks in 20.0 seconds and the second crane lifts the bricks in 40.0 seconds. What is the power developed by the first crane? What is the power developed by the second crane?arrow_forward
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