Applied Physics
11th Edition
ISBN: 9780132719865
Author: EWEN, Dale
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 13RQ
Explain how life would be easier or more difficult without friction.
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A 1.40-kg object slides to the right on a surface having a coefficient of kinetic friction 0.250 (Figure a). The object has a speed of v₁ = 3.50 m/s when it makes contact with a light spring (Figure b) that has a force constant of 50.0 N/m. The object comes to rest after the spring has been
compressed a distance d (Figure c). The object is then forced toward the left by the spring (Figure d) and continues to move in that direction beyond the spring's unstretched position. Finally, the object comes to rest a distance D to the left of the unstretched spring (Figure e).
d
m
v=0
-D- www
(a) Find the distance of compression d (in m).
m
(b) Find the speed v (in m/s) at the unstretched position when the object is moving to the left (Figure d).
m/s
(c) Find the distance D (in m) where the object comes to rest.
m
(d) What If? If the object becomes attached securely to the end of the spring when it makes contact, what is the new value of the distance D (in m) at which the object will come to…
As shown in the figure, a 0.580 kg object is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x. The force constant of the spring is 450 N/m. When it is released, the object travels along a frictionless, horizontal surface to point A, the bottom of a
vertical circular track of radius R = 1.00 m, and continues to move up the track. The speed of the object at the bottom of the track is VA = 13.0 m/s, and the object experiences an average frictional force of 7.00 N while sliding up the track.
R
(a) What is x?
m
A
(b) If the object were to reach the top of the track, what would be its speed (in m/s) at that point?
m/s
(c) Does the object actually reach the top of the track, or does it fall off before reaching the top?
O reaches the top of the track
O falls off before reaching the top
○ not enough information to tell
A block of mass 1.4 kg is attached to a horizontal spring that has a force constant 900 N/m as shown in the figure below. The spring is compressed 2.0 cm and is then released from rest.
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a
F
x = 0
0
b
i
(a) A constant friction force of 4.4 N retards the block's motion from the moment it is released. Using an energy approach, find the position x of the block at which its speed is a maximum.
ст
(b) Explore the effect of an increased friction force of 13.0 N. At what position of the block does its maximum speed occur in this situation?
cm
Chapter 5 Solutions
Applied Physics
Ch. 5.2 - Find the total force necessary to give each mass...Ch. 5.2 - Find the total force necessary to give each mass...Ch. 5.2 - Find the total force necessary to give each mass...Ch. 5.2 - Find the total force necessary to give each mass...Ch. 5.2 - Find the total force necessary to give each mass...Ch. 5.2 - Find the total force necessary to give each mass...Ch. 5.2 - Find the total force necessary to give each mass...Ch. 5.2 - Find the total force necessary to give each mass...Ch. 5.2 - Find the acceleration of each mass with the given...Ch. 5.2 - Find the acceleration of each mass with the given...
Ch. 5.2 - Find the acceleration of each mass with the given...Ch. 5.2 - Find the acceleration of each mass with the given...Ch. 5.2 - Find the acceleration of each mass with the given...Ch. 5.2 - Find the acceleration of each mass with the given...Ch. 5.2 - Find the acceleration of each mass with the given...Ch. 5.2 - Find the acceleration of each mass with the given...Ch. 5.2 - Find the acceleration of each mass with the given...Ch. 5.2 - Find the acceleration produced by a total force of...Ch. 5.2 - Find the total force necessary to give an...Ch. 5.2 - Find the total force necessary to give a rocket of...Ch. 5.2 - A forklift has a mass of 975 kg. What force must...Ch. 5.2 - A power wheelbarrow has a mass of 432 kg. What...Ch. 5.2 - What is the rate of deceleration of a 1400-kg SUV...Ch. 5.2 - An earthmover slows from 15.0 km/h to 3.00 km/h in...Ch. 5.2 - Find the total force necessary to give a 140-kg...Ch. 5.2 - Find the acceleration produced by a total force of...Ch. 5.2 - Find the mass of an object with acceleration 15.0...Ch. 5.2 - An automobile has a mass of 100 slugs. The...Ch. 5.2 - Find the acceleration produced by a force of 6.75 ...Ch. 5.2 - An astronaut has a mass of 80.0 kg. His space suit...Ch. 5.2 - A discus thrower exerts a force of 140 N on the...Ch. 5.2 - A scooter and rider together have a mass of 275...Ch. 5.2 - A pickup truck with mass of 1230 kg moving at 105...Ch. 5.3 - Find the weight for each mass. 1. m = 30. 0kgCh. 5.3 - Find the weight for each mass. 2. m = 60.0kgCh. 5.3 - Find the weight for mass. 3. m = 10.0 slugsCh. 5.3 - Find the weight for each mass. 4. m = 9.00 kgCh. 5.3 - Find the mass for each weight. 5. Fw = 17.0 NCh. 5.3 - Find the mass for each weight. 6. Fm = 21.0 lbCh. 5.3 - Find the mass for each weight. 7. Fw = 12,000 NCh. 5.3 - Find the mass for each weight. 8. Fw = 25, 000 NCh. 5.3 - Find the mass for the each weight. 9. Fw = 6.7 ...Ch. 5.3 - Find the mass for each weight. 10. Fw = 5.5 106...Ch. 5.3 - Find the weight of an 1150-kg automobile.Ch. 5.3 - Find the weight of an 81.5-slug automobile.Ch. 5.3 - Find the mass of a 2750-lb automobile.Ch. 5.3 - What is the mass of a 20,000-N truck?Ch. 5.3 - What is the mass of a 7500-N trailer?Ch. 5.3 - Find the mass of an 11,500-N automobile.Ch. 5.3 - Find the weight of a 1350-kg automobile (a) on the...Ch. 5.3 - Maria weighs 115 lb on the earth. What are her (a)...Ch. 5.3 - Johns mass is 65.0 kg on the earth. What are his...Ch. 5.3 - What is your weight in newtons and in pounds?Ch. 5.3 - What is your mass in kilograms and in slugs?Ch. 5.3 - What are your U.S. mass and weight on the moon?Ch. 5.3 - What are your metric mass and weight on the moon?Ch. 5.3 - Johns mass is 65.0 kg on the earth. What are his...Ch. 5.3 - Maria weighs 115 lb on the earth. What are her U...Ch. 5.3 - John's mass is 65.0 kg on the earth. What are his...Ch. 5.3 - What are your metric mass and weight on Jupiter,...Ch. 5.3 - What are your metric mass and weight on Mars,...Ch. 5.3 - An automobile transmission weighs 995 N. What is...Ch. 5.3 - A power wheelbarrow weighs 210 N. What is its...Ch. 5.4 - A cart on wheels weighs 2400 N. The coefficient of...Ch. 5.4 - A wooden crate weighs 780 lb. What force is needed...Ch. 5.4 - A piano weighs 4700 N. What force is needed to...Ch. 5.4 - A force of 850 N is needed to keep the piano in...Ch. 5.4 - A dog sled weighing 750 lb is pulled over level...Ch. 5.4 - A horizontal conveyor belt system has a...Ch. 5.4 - A tow truck can deliver 2500 lb of pulling force....Ch. 5.4 - A snowmobile is pulling a large sled across a...Ch. 5.4 - An automobile weighs 12,000 N and has a...Ch. 5.4 - A light truck weighs 14,000 N with a coefficient...Ch. 5.4 - A stake truck weighs 20,000 N with a coefficient...Ch. 5.4 - An alloy block is placed on a smooth composite...Ch. 5.4 - If a 20.0-N casting is placed on the block in...Ch. 5.4 - Rubber tires and wet blacktop have a coefficient...Ch. 5.4 - The coefficient of friction in Problem 15 is 0.700...Ch. 5.5 - Find the net force including its direction when...Ch. 5.5 - Find the net force including its direction when...Ch. 5.5 - Find the net force including its direction when...Ch. 5.5 - Find the net force including its direction when...Ch. 5.5 - Find the net force including its direction when...Ch. 5.5 - Find the net force including its direction when...Ch. 5.5 - Find the acceleration of an automobile of mass 100...Ch. 5.5 - Find the acceleration of an automobile of mass...Ch. 5.5 - A truck of mass 13,100 kg is acted upon by a...Ch. 5.5 - A speedboat of mass 30.0 slugs has a 300-lb force...Ch. 5.5 - A truck with a mass of 14,000 kg is pushed with a...Ch. 5.5 - A trailer has a mass of 5000 kg. It is pulled by a...Ch. 5.5 - A refrigeration unit on a job site must be slid...Ch. 5.5 - A light truck of 2000-kg mass has to be pushed...Ch. 5 - Force a. is a vector quantity. b. may be different...Ch. 5 - The metric weight of a 10-lb bag of sugar is...Ch. 5 - Mass and weight a. are the same. b. are different....Ch. 5 - According to Newtons second law, the law of...Ch. 5 - Friction a. always acts parallel to the surface of...Ch. 5 - Cite three examples of forces acting without...Ch. 5 - Using your own words, state Newton's first law,...Ch. 5 - Distinguish between velocity and acceleration.Ch. 5 - When the same force is applied to two different...Ch. 5 - Is 3 lb heavier than 10 N?Ch. 5 - Explain how life would be easier or more difficult...Ch. 5 - Explain how the weight of an astronaut is...Ch. 5 - Explain the difference between action and reaction...Ch. 5 - State Newton's third law of motion, the law of...Ch. 5 - A crate of mass 6.00 kg is moved by a force of...Ch. 5 - An 825-N force is required to pedal a bike with an...Ch. 5 - A block of mass 0.89 slug moves with a force of...Ch. 5 - What is the force necessary for a 2400-kg truck to...Ch. 5 - Two movers push a piano across a frictionless...Ch. 5 - A 340-N box has a frictional force of 57 N. Find...Ch. 5 - A truck pulls a trailer with a frictional force of...Ch. 5 - A steel box is slid along a steel surface. It has...Ch. 5 - A rock of a mass 13.0 kg is dropped from a cliff....Ch. 5 - A projectile has a mass of 0 37 slug. Find its...Ch. 5 - What force is required to produce an acceleration...Ch. 5 - Find the total force necessary to give a 280-kg...Ch. 5 - A force of 175 N is needed to keep a 640 -N...Ch. 5 - A crated garden tractor weighs 375 N. What force...Ch. 5 - Find the acceleration of a forklift of mass 1400...Ch. 5 - What is the weight of a 375-kg air compressor?Ch. 5 - What is the mass of a 405-N welder?Ch. 5 - What is the mass of a 12.0-N hammer?Ch. 5 - Engineers at Boeing developing specs for their...Ch. 5 - The Apollo spacecrafts were launched toward the...Ch. 5 - Kirsten's mass is 373 slugs. Being the physics fan...Ch. 5 - A motorcycle racer travelling at 145 km/h loses...Ch. 5 - The motorcycle and rider are sliding with the same...
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