Physics Laboratory Experiments
8th Edition
ISBN: 9781285738567
Author: Jerry D. Wilson, Cecilia A. Hernández-Hall
Publisher: Cengage Learning
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Textbook Question
Chapter 12, Problem 3ASA
Discuss the relationship between work and energy for a car moving with a constant speed (a) up an incline and (b) down an incline.
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Physics Laboratory Experiments
Ch. 12 - Prob. 1EPCh. 12 - If the mass of the connecting string is small...Ch. 12 - Now consider the case of the car moving down the...Ch. 12 - Examine your equations for f, and determine what...Ch. 12 - The previous strategy to calculate Wf was based on...Ch. 12 - Since a nonconservative force is present (f), some...Ch. 12 - Distinguish between the conservation of mechanical...Ch. 12 - Is mechanical energy conserved in real situations?...Ch. 12 - Discuss the relationship between work and energy...Ch. 12 - Under what conditions would the frictional forces...
Ch. 12 - Is the force of friction the same for different...Ch. 12 - What are possible sources of error in this...Ch. 12 - What was the work done by the suspended weight...Ch. 12 - What was the work done by gravity acting on the...Ch. 12 - (a) For the car going up the incline, what...Ch. 12 - Suppose the car accelerated up and down the...Ch. 12 - Is the assumption justified that f would be the...Ch. 12 - Assuming that f = N (see Experiment 11), show that...
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- What is the dominant factor that affects the speed of an object that started from rest down a frictionless incline if the only work done on the object is from gravitational forces?arrow_forwardA rope having a total mass of 0.4 kg and total length 4 m has 0.6 m of the rope hanging vertically down off a work bench. How much work must be done to place all the rope on the bench?arrow_forwardA mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance?arrow_forward
- The force F(x) varies with position, as shown beolow Find the work done by this force on a particle as It moves from x=1.0 m to x=5.0 m.arrow_forwardA baseball of mass 0.25 kg is hit at home plate with a speed of 40 m/s. When it lands in a seat in the left-field bleachers a horizontal distance 120 m from home plate, it is moving at 30 m/s. If the ball lands 20 m above the spot where it was hit, how much work is done on it by air resistance?arrow_forwardA boy throws a ball of mass 0.25 kg straight upward with an initial speed of 20 m/s When the ball returns the boy, its speed is 17 m/s How much much work does air resistance do on the ball during its flight?arrow_forward
- A cyclist in a race must climb a 5 hill at a speed of 8 m/s. If the mass of the bike and the biker together is 80 kg, what must be the power output of the biker to achieve the goal?arrow_forwardA particle of mass 2.0 kg moves under the influence of the force F(x)=(5x2=7x)N . Suppose a frictional force also acts on the particle. If the particle’s speed when it starts at x=4.0 m is 0.0 m/s and when it arrives at x=4.0 m is 9.0 m/s, how much work is done on it by the frictional force between x=4.0 m and x=4.0 m?arrow_forwardThe surface of the preceding problem is modified so that the coefficient of kinetic friction is decreased. The same horizontal force is applied to the crate, and after being pushed 8.0 m, its speed is 5.0 m/s. How much work is now done by the force of friction? Assume that the crate starts at rest.arrow_forward
- Compare the work required to stop a 100-kg crate sliding at 1.0 m/s and an 8.0-g bullet traveling at 500 m/s.arrow_forwardA 0.20-kg ball is thrown upward. How much work is done on the ball by gravity as the ball rises between heights of 2.0 m and 3.0 m?arrow_forwardCan the power expended by a force be negative?arrow_forward
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Mechanical work done (GCSE Physics); Author: Dr de Bruin's Classroom;https://www.youtube.com/watch?v=OapgRhYDMvw;License: Standard YouTube License, CC-BY