14-D40 The skidsteer has a mass of 3000 kg and the box has mass of 1000 kg. There is friction between the box and the floor µ=0.5. The skidsteer can generate a pushing force F. Assume that the skidsteer has all wheel drive, that there is enough friction to prevent slip, and a mechanical efficiency = 0.75. What is the required engine power to move forward at a constant speed of 5 m/s. Express the answer in terms of kW and hp. What is the required engine power at v=5 m/s with an acceleration of 2 m/s². Express the answer in terms of kW and hp. 03 m AL B F

14-D40 The skidsteer has a mass of 3000 kg and the box has mass of 1000 kg. There is friction between the box and the floor µ=0.5. The skidsteer can generate a pushing force F. Assume that the skidsteer has all wheel drive, that there is enough friction to prevent slip, and a mechanical efficiency = 0.75. What is the required engine power to move forward at a constant speed of 5 m/s. Express the answer in terms of kW and hp. What is the required engine power at v=5 m/s with an acceleration of 2 m/s². Express the answer in terms of kW and hp. 03 m AL B F

Name: 14-D40 The skidsteer has a mass of 3000 kg and the box has mass of 10
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Description: 14-D40 The skidsteer has a mass of 3000 kg and the box has mass of 1000 kg. There is friction between the box and thefloor µ=0.5. The skidsteer can generate a pushing force F. Assume that the skidsteer has all wheel drive, that there isenough fricti

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 44P: A 25.0-kg child on a 2.00-m-long swing is released from rest when the ropes of the swing make an...

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The force exerted by a diving board is conservative, provided the internal friction is negligible. Assuming friction is negligible, describe changes in the potential energy of a diving board as a swimmer drives from it, starting just before the swimmer steps on the board until just after his feet leave it.
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The Flybar high-tech pogo stick is advertised as being capable of launching jumpers up to 6 ft. The ad says that the minimum weight of a jumper is 120 lb and the maximum weight is 250 lb. It also says that the pogo stick uses a patented system of elastometric rubber springs that provides up to 1200 lbs of thrust, something common helical spring sticks simply cannot achieve (rubber has 10 times the energy storing capability of steel). a. Use Figure P8.32 to estimate the maximum compression of the pogo sticks spring. Include the uncertainty in your estimate. b. What is the effective spring constant of the elastometric rubber springs? Comment on the claim that rubber has 10 times the energy-storing capability of steel. c. Check the ads claim that the maximum height a jumper can achieve is 6 ft.
Rubber tends to be nonlinear as an elastic material. Suppose a particular rubber band exerts a restoring force given by Fx(x) = Ax Bx2, where the empirical constants are A = 14 N/m and B = 3.3 N/m2 so that Fx is in newtons when x is in meters. Calculate the change in elastic potential energy of the rubber band when an external force stretches it from x = 0 to x = 0.20 m.
A roller-coaster car of mass 1.50 103 kg is initially at the top of a rise at point . It then moves 35.0 m at an angle of 50.0 below the horizontal to a lower point . (a) Find both the potential energy of the system when the car is at points and and the change in potential energy as the car moves from point to point , assuming y = 0 at point . (b) Repeat part (a), this time choosing y = 0 at point , which is another 15.0 m down the same slope from point .
A block of mass m = 0.250 kg is pressed against a spring resting on the bottom of a plane inclined an angle = 45.0 to the horizontal. The spring, which has a force constant of 955 N/m, is compressed a distance of 8.00 cm, and the block is released from rest. Consider the total energy of the springblockEarth system. a. What is the total distance the block moves from its initial position if the incline is frictionless? b. What is the total distance the block moves from its initial position if the coefficient of kinetic friction between the incline and the block is 0.330?
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When an automobile moves with constant speed down a highway. most of the power developed by the engine is used to compensate for the energy transformations due to friction forces exerted on the car by the air and the road. If the power developed by an engine is 175 hp, estimate the total friction force acting on the car when it is moving at a speed of 29 m/s. One hone-power equals 746 W.
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Jonathan is riding a bicycle and encounters a hill of height 7.30 m. At the base of the hill, he is traveling at 6.00 m/s. When he reaches the top of the hill, he is traveling at 1.00 m/s. Jonathan and his bicycle together have a mass of 85.0 kg. Ignore friction in the bicycle mechanism and between the bicycle tires and the road. (a) What is the total external work done on the system of Jonathan and the bicycle between the time he starts up the hill and the time he reaches the top? (b) What is the change in potential energy stored in Jonathans body during this process? (c) How much work does Jonathan do on the bicycle pedals within the JonathanbicycleEarth system during this process?
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