Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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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?
Work is (select all that apply)
the force times the parallel displacement
the dot product of force and displacement
the displacement times the parallel force
| the displacement times the perpendicular force
the force times the perpendicular displacement
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?
Chapter 1 Solutions
Physics for Scientists and Engineers
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_forwardWork is equal to force times the distance. This means that to do the same amount of work, a greater distance requires less force. Consider a see-saw in balance. One object, A, is placed D from the fulcrum and the other object, B, is placed 1/2D from the fulcrum. Which object weighs more? A B Both A and B weigh the same. It depends on how strong gravity is.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
- Person 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_forwardA 170-lb man carries a 20-lb can of paint up a helical staircase that encircles a silo with radius 30 ft. If the silo is 120 ft high and the man makes exactly four complete revolutions, how much work is done by the man against gravity in climbing to the top? Answer in ft-lbs.arrow_forwardThe work done by a force on an object is the dot product of force vector and the displacement.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_forwardAn old forklift is replaced with a new one. The new forklift has 2x the power of the old one. How much more work can the new forklift do compared to the old one if they are allowed the same amount of time to accomplish their work? Double Question:The new and old forklifts in the previous problem are now lifting the same amount of weight. How much time would it take the new forklift to do this compared to the old one?arrow_forward
- An object is placed to a shelf from the ground which is 1.8 m higher. find out how much work is done by you. If the same object falls to the ground, how much work is done by gravity? Mass of the object is 200 g.arrow_forwardCalculate the dot product of the two vectors: A=i+4j-3k and B=j-2k O 10 O 1 O 3 O -3arrow_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_forward
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