2b lengthForce (Newtons)b,If, instead óf the fish, we place a 4.00 kg POER IH The pan, noW Imuon2. An unstretched spring is 11.00 cm long. When you hang an 825 g weight from it, it stretches to a length of14.00 cm.a.What is the force constant of this spring?What total mass must you hang from the spring to stretch it to a total length of 18.00 cm?3. A light spring having a force constant of 105 N/m is used to pull a 6.50 kg sled on a horizontal frictionlessice rink. The sled has an acceleration of 2.30 m/s².a. By how much does the spring stretch if it pulls on the sled horizontallyb. ) By how much does the spring stretch if it pulls on the sled at 37.0 oabove the horizontal?4. Toy makers have always been interested in springs for the entertainment valueof the motion they produce. One well-known application shown in is a babybouncer, which consists of a harness seat for a toddler, attached to a spring.The entire contraption hooks onto the top of a doorway. The idea is for thebaby to hang in the seat with his or her feet just touching the ground so thatgood push up will get the baby bouncing, providing potentially hours ofentertainment.15ma. The following chart and accompanying graph shown indepict an experiment to determine the spring constantfor a baby bouncer. What is the spring constant k of thespring being tested for the baby bouncer?b. One of the greatest difficulties with setting up the babybouncer is determining the right height above the floorso that the child can push off and bounce. Knowledge ofphysics can be really helpful here. If the spring constantk = 5.0×10²N/m, the baby has a mass m=11kg, and thebaby's legs reach a distance d=0.15m from the bouncer,what should be the height h of the "empty" bouncerabove the floor?Example Data forBaby Bounce Spring10986.HEOhe's awSoP = Fiseてon0.005 0.01 0.015 0.02= lONDisplacement (meters)%3D

Name: 2b lengthForce (Newtons)b,If, instead óf the fish, we place a 4.00 kg
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Description: 2b lengthForce (Newtons)b,If, instead óf the fish, we place a 4.00 kg POER IH The pan, noW Imuon2. An unstretched spring is 11.00 cm long. When you hang an 825 g weight from it, it stretches to a length of14.00 cm.a.What is the force constant of this

2) unstretched length (L) = 11 cm m1 = 825 g new length (L') = 14 cm

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2. An unstretched spring is 11.00 cm long. When you hang an 825 g weight from it, it stretches to a length of 14.00 cm. a. What is the force constant of this spring? What total mass must you hang from the spring to stretch it to a total length of 18.00 cm? ntal frictionless

2. An unstretched spring is 11.00 cm long. When you hang an 825 g weight from it, it stretches to a length of 14.00 cm. a. What is the force constant of this spring? What total mass must you hang from the spring to stretch it to a total length of 18.00 cm? ntal frictionless

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter6: Applications Of Newton's Laws

Section: Chapter Questions

Problem 39P: A student’s backpack, full of textbooks, is hung from a spring scale attached to the ceiling of an...

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A student’s backpack, full of textbooks, is hung from a spring scale attached to the ceiling of an elevator. When the elevator is accelerating downward at 3.8m/s2 , the scale reads 60 N. (a) What Is the mass of the backpack? (b) What does the scale read if the elevator moves upward while speeding up at a rate 3.8m/s2 ? (c) What does the scale read if the elevator moves upward at constant velocity? (d) If the elevator had no brakes and the cable supporting it were to break loose so that the elevator could fall freely, what would the spring scale read?
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Suppose you have a 120-kg wooden crate resting on a wood floor, with coefficient of static friction 0.500 between these wood surfaces. (a) What maximum force can you exert horizontally on the crate without moving it? (b) If you continue to exert this force once the crate starts to slip, what will its acceleration then be? The coefficient of sliding friction is known to be 0.300 for this situation.
A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800.0 N on him. The mass of the losing player plus equipment is 90.0 kg, and he is accelerating backward at 1.20m/s2 . (a) What is the force of friction between the losing player’s feet and the grass? (b) What force does the winning player exert on the ground to move forward if his mass plus equipment is 110.0 kg?
Consider the 52.0-kg mountain climber shown below. (a) Find the tension in the rope and the force that the mountain climber must exert with her feet on the vertical rock face to remain stationary. Assume that the force is exerted parallel to her legs. Also, assume negligible force exerted by her arms. (b) What is the minimum coefficient of friction between her shoes and the cliff?