8. A child pulls a friend in a little red wagon with constant speed. If the child pulls with a force of16 N for 10.0m, and the handle of the wagon is inclined at an angle of 25° above the horizontal,how much work does the child do on the wagon? Assume the mass of the wagon system is45 kg.What is the coefficient of friction between the wagon and the ground?If the friction force remains the same when the force applied by the child is doubled, what willthe final speed of the wagon be after travelling from rest for a distance of 10m?3

Let's explain this problem in detail: A child pulls a friend in a little red wagon with a force of…

Answered: 8. A child pulls a friend in a little…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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2. Hodor and Bran must cross a horizontal frictionless 12-m long ice bridge. From one foot of the bridge, Hodor pulls Bran who is sitting on a sled by a 150-N force that makes an angle of 30° with the horizontal. Find: (2) the work done by Hodor, (b) the change in the kinetic energy of Bran and the sled, and (c) the speed of Bran and the sled at the end of the bridge if initially, they are at rest. Bran and the sled have a combined mass of 280 kg.
A person pushes a 15.0- kg shopping cart at a constant velocity for 20.0 m. She pushes in a direction 30.0° below the horizontal. A 48.0- N frictional force opposes the motion of the cart. a) What is the magnitude of the force that the shopper exerts? Determine the work done by b) The pushing force, c) The frictional force d) The gravitational force e) The normal force f) Calculate total work done on the shopping cart.
Part d and e
A box of mass 3 kg is moving to the right at 5 m/s and has an acceleration to the left of -2 m/s2. It is slowing down. You are pushing it with a 20 N force. a) What is the net force in Newtons? b) What is the force of friction in Newtons? c) If the block slides 5.0 m to the right, what is the net work done? d) If the initial kinetic energy of the box is 37.5 J, what is the final kinetic energy?
How much work is done in lifting a 300-kg marble slab to a height of 50m on a building under construction? 2. Eating a banana enables a person to perform about 4.0 x 104 J of work. To what height does eating a banana enable a 70-kg heart patient to climb. 3. Calculate the work done by a mother who exerts a force of 8 N at an angle of 40° below the horizontal x-axis in pushing her baby in a carriage to a distance of 20m.
A crate of mass 20.0 kg is pushed up a rough incline, which makes an angle of 25° with the horizontal, with an initial speed of 1.50 m/s. The pushing force is a horizontal force of magnitude 350 N. The coefficient of kinetic friction is 0.400, and the crate is pushed 5.00 m. How much work is done by gravity? a. How much mechanical energy is lost due to friction? h. How much work is done by the 350-N force? e. What is the change in kinetic energy of the crate? (Use work-energy theorem) What is the speed of the crate after being pulled 5.00 m? d. e.
2. A constant force of 1200 N is required to push a car along a straight line. A person displaces the car 45 m. How much work is done by the person?
S 10. A box of mass 7.60 kg is pulled from rest up a 46.5 m long incline that makes an angle of 22.0° with horizontal. The coefficient of kinetic friction between the box and the incline is 0.200. At the top of the incline, the speed of the box is 4.50 m/s. What is the work done by the pulling force? J E L C 2 R F 5 T G 6 MacBook Air B 00 S Y 7 Submit Assignment H S N J 9 M K MOSISO ge command
Two men, Joel and Jerry, push against a wall. Jerry stops after 10 min, while Joel is able to push for 5.0 min longer. Compare the work they do. Select one: а. Both men do positive work, but Jerry does 50% more work than Joel. b. Both men do positive work, but Joel does 50% more work than Jerry. С. Neither of them does any work. d. Both men do positive work, but Joel does 75% more work than Jerry. е. Both men do positive work, but Joel does 25% more work than Jerry.
A person is accelerating a box across the floor using a force Fpull for a distance d. There is a force of friction on the box Ff. How would you expect the amount of net work done in the x-direction (Wnet) to compare to Wpull, the amount of work done by the pulling force? Wnet = Wpull because Wpull is calculated using the net force Wnet Wpull because the friction force also does work Wnet = 0 because the pulling force and the friction force cancel out
A 5.40-kg box rests on a horizontal surface. The coefficient of kinetic friction between the box and surface is µk 0.410. A horizontal force pulls the box at constant velocity for 23.0 cm. Find the work done by the applied horizontal force. Submit Answer Tries 0/10 Find the work done the frictional force. Submit Answer Tries 0/10 Find the work done by the net force. Submit Answer Tries 0/10
Problem 7: Rescue workers lower a sled and injured ice climber, with a combined mass of 95 kg, down a 60° slope at a constant speed as shown in the diagram. The coefficient of kinetic friction between the sled and the snow is 0.1. Suppose the sled is lowered 30 m along the hillside. a) How much work is done by friction as the sled/climber moves along the hill? b) How much work is done by the gravitational force as the sled/climber moves along the hill? c) How much work is done by the tension force in the rope as the sled/climber moves along the hill? d) What is the net work done on the sled/climber? 60° W T

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