The two ropes shown in the bird's-eye view of (Figure 1) are used to drag a crate 4.1 m across the floor. Figure Express your answer with the appropriate units. HÅ WT = Value Units Submit Previous Answers Request Answer ? 1 of 1 × Incorrect; Try Again; 8 attempts remaining Part C t 326 N How much work is done by the force T₂? Express your answer with the appropriate units. 20° 500 N k HÅ T30° T2 WT₁₂ = Value Units 223 N Submit Request Answer ?

The two ropes shown in the bird's-eye view of (Figure 1) are used to drag a crate 4.1 m across the floor. Figure Express your answer with the appropriate units. HÅ WT = Value Units Submit Previous Answers Request Answer ? 1 of 1 × Incorrect; Try Again; 8 attempts remaining Part C t 326 N How much work is done by the force T₂? Express your answer with the appropriate units. 20° 500 N k HÅ T30° T2 WT₁₂ = Value Units 223 N Submit Request Answer ?

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Description: The two ropes shown in the bird's-eye view of (Figure 1) are usedto drag a crate 4.1 m across the floor.FigureExpress your answer with the appropriate units.HÅWT₁ =ValueUnitsSubmitPrevious Answers Request Answer?1 of 1× Incorrect; Try Again; 8 attem

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 100CP: The surface of the preceding problem is modified so that the coefficient of kinetic friction is...

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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.
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.
The force acting on a particle is Fx = (8x 16), where F is in newtons anti x is in meters. (a) Make a plot of this force versus x from x = 0 to x = 3.00 m. (b) From your graph, find the net work done by this force on the particle as it moves from x = 0 to x = 3.00 m.
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).
The 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.
A particle is subject to a force Fx that varies with position as shown in Figure P7.9. Find the work done by the force on the particle as it moves (a) from x = 0 to x = 5.00 m, (b) from x = 5.00 m to x = 10.0 m, and (c) from x = 10.0 m to x = 15.0 m. (d) What is the total work done by the force over the distance x = 0 to x = 15.0 m?
a shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 below the horizontal. The force is just sufficient to overcome various frictional forces, so the cart moves at constant speed, (a) Find the work done by the shopper as she moves down a 50.0-m length aisle, (b) What is the net work done on the cart? Why? (c) The shopper goes down the next aisle, pushing horizontally and maintaining the same speed as before. If the work done by frictional forces doesnt change, would the shoppers applied force be larger, smaller, or the same? What about the work done on the cart by the shopper?
a shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 below the horizontal. The force is just sufficient to overcome various frictional forces, so the cart moves at constant speed, (a) Find the work done by the shopper as she moves down a 50.0-m length aisle, (b) What is the net work done on the cart? Why? (c) The shopper goes down the next aisle, pushing horizontally and maintaining the same speed as before. If the work done by frictional forces doesnt change, would the shoppers applied force be larger, smaller, or the same? What about the work done on the cart by the shopper?
The force acting on a panicle varies as shown in Figure la P7.14. Find the work done by the force on the particle as it moves (a) from x = 0 to x = 8.00 m. (b) from x = 8.00 m to x = 10.0 m, and (c) from x = 0 to x = 10.0 m.
A student expends 7.5 W of power in lifting a textbook 0.50 m in 1.0 s with a constant velocity. (a) How much work is done, and (b) how much does the book weigh (in newtons)? The answers to Confidence Exercises may be found at the back of the book.
Give an example of something we think of as work in everyday circumstances that is not work in the scientific sense. Is energy transferred or changed in form in your example? If so, explain how this is accomplished without doing work.
A shopper in a supermarket pushes a cart with a force of 35.0 N directed at an angle of 25.0 below the horizontal. The force is just sufficient to balance various friction forces, so the cart moves at constant speed. (a) Find the work done by the shopper on the cart as she moves down a 50.0-m-long aisle. (b) The shopper goes down the next aisle, pushing horizontally and maintaining the same speed as before. If the friction force doesnt change, would the shoppers applied force be larger, smaller, or the same? (c) What about the work done on the cart by the shopper?