Problem 3: A 500-kg dragster accelerates from rest to a final speed of 110 m/sec in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is the work done by the dragster? Hint: Wnet Wdragster - Wfriction. Answer: Waragster = 3.5 × 106 J =

Problem 3: A 500-kg dragster accelerates from rest to a final speed of 110 m/sec in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is the work done by the dragster? Hint: Wnet Wdragster - Wfriction. Answer: Waragster = 3.5 × 106 J =

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Description: Problem 3:A 500-kg dragster accelerates from rest to a final speed of 110 m/sec in 400 m (about a quarterof a mile) and encounters an average frictional force of 1200 N. What is the work done by thedragster? Hint: Wnet = Waragster - Wfriction. Answe

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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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
Ch.7 Problem 38
Question: How much work did friction do on the book? Information: The book from problem 1 is then allowed to slide down a straight ramp which makes a 26.0o angle above the horizontal, and the book reaches its original position at the end of this ramp. If the book is actually going 3.00 m/s, what was the coefficient of friction between thebook and the ramp?
Question: The book from problem 1 is then allowed to slide down a straight ramp which makes a 26.0o angle above the horizontal, and the book reaches its original position at the end of this ramp. How fast would it be going if there was no friction? Information(Problem 1): A student does 125.0 J of work lifting a 12.0 kg book. How high was the book lifted?
Number 16
A 1080 kg car accelerates at a rate of 2.1 m/s/s over a distance of 18 meters. How much work was done by the engine onthe car? HINT: Use the formula F=ma to solve for the force. Then use the force and distance to calculate the work
DIRECTION: CHOOSE THE CORRECT ANSWER F 1.A force of 5i+j+ 2k N displaced a body from a position of i+j+km to 2i +4j+ 6k m. How much work is done to displace it through this position? (A)18J (B)6J (C)12J (D)0J 2.Calculate the work done when a force of 2i+5j+ 5k N acts on a body when it produces a displacement of 2i + 4j+ 6k m. (A)54J (B)24J (C)50J (D)18J 3. A body of mass 10 kg at rest is acted upon simultaneously by two forces 4 N and 3 N at right angles to each other. The kinetic energy of the body at the end of 10 sec is (A)100 J (B) 300 J (D) 125 J 4) Consider an 80 kg man and 320 kg horse both running along a road with the same kinetic energy. (C)50 J The man must run (A) with the same speed as the horse. (CSS) 4 times as fast as the horse. (B) twice as fast as the horse. (D) 16 times as fast as the horse. 5)particle A is travelling at a velocity of []m/s. It collides with particle B which has a velocity of Jm/s. The particle move together. The mass of particle A is 2kg and the…
15. A particle is subject to a force F, that varies with posi- W tion as shown in Figure P7.15. Find the work done by the force on the particle as it moves (a) from x = 0 to 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? x= F, (N) 3 2 1 0 x (m) 2 4 6 8 10 12 14 16 Figure P7.15 Problems 15 and 34.
do on the shopping cart? W -107.5 J 2. You apply a force of 1.5 N at an angle of 34° from the vertical on a block that is sitting on a friction-less table. The force you apply causes the block to slide across the table for 1 m. How much work did you do to move the block? 0.84 J 3. An 8.5 kg package in a mail sorting room slides 20 mdown a chute that
Wfric Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 100.0 kg down a 60° slope at constant speed, as shown in the figure. The coefficient of friction between the sled and the snow is 0.100. = (a) How much work is done by friction as the sled moves 30.0 m along the hill. Enter to 3 significant figures Wrope 1.47 × 10³ J = W grav 60° (b) How much work is done by the rope on the sled in this distance? Hint: use Newton's second law to find the tension. Enter to 3 significant figures W -2.39x104 T = 2.55×104 J (c) What is the work done by the gravitational force on the sled? Enter to 3 significant figures
Humans can produce an output power as great as 20 W/kgW/kg during extreme exercise. Sloths are not so energetic. At its maximum speed, a 4.0 kgkg sloth can climb a height of 6.0 mm in 2.0 minmin. (Figure 1) a. How much work does the sloth do against gravity to climb 6.0 mm? b.What is the sloth’s specific power output during this climb? Express your answer in watts per kilogram.
A horizontal force, acts on an 8N box. The box moves 12 m horizontally at a constant speed. The coefficient of kinetic friction is 0.25. Determine the work done by the horizontal force.