PROVIDE COMPLETE AND ORGANIZED SOLUTION, IF NECESSARY. INCLUDE UNITS IN THE SOLUTION & FINAL ANSWER. ENCLOSE FINAL ANSWERS IN BOXES 5. A man (on a coaster) slides down a roller coaster, starting from rest, from an initial height of 25 meters as shown in the figure below. The initial potential energy of the man(with the coaster) is 2.6 x 10° J. Assume there is no friction between the coaster and track. A. What is the initial KE of the system? B. What would be the KE of the system at point b? C. What is the KE of the system at point c? D. What is the Speed at point C?

PROVIDE COMPLETE AND ORGANIZED SOLUTION, IF NECESSARY. INCLUDE UNITS IN THE SOLUTION & FINAL ANSWER. ENCLOSE FINAL ANSWERS IN BOXES 5. A man (on a coaster) slides down a roller coaster, starting from rest, from an initial height of 25 meters as shown in the figure below. The initial potential energy of the man(with the coaster) is 2.6 x 10° J. Assume there is no friction between the coaster and track. A. What is the initial KE of the system? B. What would be the KE of the system at point b? C. What is the KE of the system at point c? D. What is the Speed at point C?

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 62P: A small block of mass 200 g starts at rest at A, slides to B where its speed is then slides along...

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A small block of mass 200 g starts at rest at A, slides to B where its speed is then slides along the horizontal surface a distance 10 m before coming to rest at C. (See below.) (a) What is the work of friction along the curved surface? (b) What is the coefficient of kinetic friction along the horizontal surface?
A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N frictional force. He pushes in a direction 25.Oc below the horizontal. (a) What is the work done on the cart by friction? (b) What is the work done on the cart by the gravitational force? (c) What is the work done on the cart by the shopper? (d) Find the force the shopper exerts, using energy considerations. (e) What is the total work done on the cart?
B. Answer the following problem scientifically. Use the GRESA method and box your final answer. 1) A ball has 17J of kinetic energy and its mechanical energy is 25J. a. Find the gravitational potential energy of the ball' C? b. If the ball has a mass of 3,2 k& what is Its height above the ground? c. What is the speed of the ball?
A. Suppose you lift a 15 kg box by a height of 1.0 m. How much work do you do in lifting the box? Express your answer using two significant figures. B. Instead of lifting the box straight up, suppose you push it up a 1.0-m-high ramp that makes a 30 ∘ degree angle with the horizontal, as shown in (Figure 1). Being clever, you choose a ramp with no friction. How much force is required to push the box straight up the slope at a constant speed? Express your answer using two significant figures. C. How long is the ramp? Express your answer using two significant figures. D. Use your force and distance results to calculate the work you do in pushing the box up the ramp. Express your answer using two significant figures.
B. Answer the following questions in complete sentence. 1.Is the layman concept of work the same as its scientific counterpart? 2. When is work really done? 3. How can we strategically increase the work done on an object?
Instructions 1. Write your complete solution for each item. It should be handwritten. 2. Make sure to simplify your answers and box/underline/highlight your final answer. A. Solve the following problems. 17F1 3.) The natural length of a spring is 8 inches. A force of 20 lb stretches the spring to 10 in. Find the work done in stretching the spring from its natural length to 12 in.
Guide Questions: Do the following tasks and solve the problems. Use separate sheets of paper for your answers. Situation: A stone with a mass of 0.1 kg is dropped from a building with a height of 80 m. Q3. Canusau su puw.. u. nuicuc energies atti un vvn uo uavelea 2u ...eters. Q4. Calculate its potential and kinetic energies just before the stone touches the ground. Assume that air friction is negligible and the reference position is the ground.
If you drop a 13.Okg ball from a height of 30m (neglect friction). How many Joules of Potential Energy does it have at the moment before dropping it? 3. a. b. How many Joules.of Kinetic Energy will it have when it is halfway through its fall? c. How fast is it going as it impacts the ground?
A man pushes a cart 25m at a constant speed on ground level, against a 36N frictional force. He pushes in a direction that is 28.5 degrees below the horizontal. A. What is the work done by gravity, friction, and the man? B. Find the force in N that the shopper exerts using energy consideration. (give your answer as a magnitude) C. What is the total work done by all forces on the cart?
A 1.5kg book is sliding along a horizontal surface. At point A, it is moving at 3.21m/s, and atpoint B it has slowed to 1.25m/s. a. How much work was done on the book between A and B?b. Suppose the book continues its motion and -0.750 Joules of work is done on the book frompoint B to C. How fast is it moving at point C?
4. A 1000 kg-roller-coaster car ahown in figure is pulled up to point 1 where it is released from rest. Assuming no friction. a. What is the mechanical energy of the roller-coaster car? b. calculate the speed of the roller-coaster car at points 2. c. calculate the speed of the roller-coaster car at points 3. d. calculate the speed of the roller-coaster car at points 4.
Suppose a force of 60 N is required to stretch and hold a spring 0.1 m from its equilibrium position. a. Assuming the spring obeys Hooke's law, find the spring constant k. b. How much work is required to compress the spring 0.6 m from its equilibrium position? c. How much work is required to stretch the spring 0.2 m from its equilibrium position? d. How much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. k= (Type an integer or a decimal.) b. Set up the integral that gives the work done in compressing the spring 0.6 m from its equilibrium position. Use decreasing limits of integration. (Type exact answers.) Find the work done in compressing the spring. The work is (Type an integer or a decimal.) c. Set up the integral that gives the work done in stretching the spring 0.2 m from its equilibrium position. Use increasing limits of integration. dx (Type exact answers.) Find the work done in stretching the spring. The…