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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Students have asked these similar questions
Which of the following statements are true about power? Include all that apply.
Power is a time-based quantity.
Power refers to how fast work is done upon an object.
Powerful people or powerful machines are simply people or machines which always do a lot of work.
A force is exerted on an object to move it at a constant speed. The power delivered by this force is the magnitude of the force multiplied by the speed of the object.
The standard metric unit of power is the Watt.
If person A and person B do the same job but person B does it faster, then person A does more work but person B has more power.
The Newton•meter is a unit of power.
A 60-kg boy runs up a 2.0 meter staircase in 1.5 seconds. His power is approximately 80 Watt.
A 300-Newton force is applied to a skier to drag her up a ski hill at a constant speed of 1.5 m/s. The power delivered by the toe rope is 450 Watts
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.
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 energy
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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- Consider humans generating electricity by pedaling a device similar to a stationary bicycle. Construct a problem in which you determine the number of people it would take to replace a large electrical generation facility. Among the things to consider are the power output that is reasonable using the legs, rest time, and the need for electricity 24 hours per day. Discuss the practical implications of your results.arrow_forwardA 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_forwardA ladder is leaning against the wall of a building in such a way that the top of the ladder is 4m from the ground. Calculate the work you need to do to lift a 5kg bucket of paint from the ground to the top of the ladder. Enter your numerical answer (i.e. don't enter the units). Answer:arrow_forward
- Determine 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_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_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 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_forwardTwo robots are used to push carts across a warehouse floor. A shorter robot pushes the carts horizontally, and a taller one pushes at an angle (partially down and partially forward). Which of the following is true if they both push with the same force (but at different angles)? Your answer: The shorter robot will do more work and increase the speed most when traveling 10 meters. The taller robot will do more work and increase the speed most when traveling 10 meters. The two robots will cause the same change in speed when traveling 10 meters.arrow_forward
- The work done by a force on an object is the dot product of force vector and the displacement.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_forwardPower 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 .arrow_forward
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