# 121 Lab 4 - Force Vectors

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University of Notre Dame *

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Physics

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Dec 6, 2023

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Related Questions

The coefficient of static friction between a book and the level surface it slides on is 0.65. If the mass of the book is 2.0 kg, what minimum initial applied force is required to slide the books across the surface? Input your answer with correct significant digits and no units.

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The systems shown below are in equilibrium with m= 5.20 kg and ? = 28.0°. If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline are frictionless.
Figure (b): A diagonal pulley extends outward from the leftmost edge of a horizontal surface. An object of mass mis suspended from a string which passes over the pulley and anchored at the left end of a spring scale. Another string connects from the right end of the spring scale to a nearby wall.
Figure (d): An object of mass mis positioned upon an inclined plane of angle ?. A string parallel to the incline connects the object to a spring scale which is also parallel to the incline and positioned closer to the top of the incline. The opposite end of the scale is anchored at the incline's highest point.

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Three cables are used to hold a hot-air balloon in place. The tension in the cable AD is 658 N.
Draw the Free Body Diagram at A. Upload this along with your all your workings for this problem to the dropbox.
What is the tension in the cable AB? Enter using 3 significant figures.
What is the tension in the cable AC? Enter using 3 significant figures.
What is the vertical force V exerted by the balloon at point A? Enter using 4 significant figures.

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The systems shown below are in equilibrium. If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline are frictionless. (Let m = 3.52 kg and θ = 28.0°.)
scale in (a)
N
scale in (b)
N
scale in (c)
N
scale in (d)
N

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A rope 17 cm is suspended between two hooks, 13 cm apart and at the same level. What is the pull on each hook, if a weight of 450 N is hanging 5 cm from the right hook?
I didn't understand the previous answer so i had to submit again, please explain it well. Thank you

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Applying principles of dynamics (written detailed solutions please :( )
A game requires that two children throw a ball upward as high as possible at the same point and then to run horizontally in opposite directions. The child who travels the greater distance before their thrown ball impacts the ground winds. One child throws the ball at his arm’s height of 4.5 ft at a speed of 69 ft/sec and runs leftward at a speed of 16 ft/sec. The other child does the same but was able to throw better releasing his ball at a heigh of 6 ft at a speed of 71 ft/sec then runs rightward at a speed of 17 ft/sec. Which child wins the game?

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answer 5
needs solution/explanation.
please type the solution if you can because i cannot see handwritten sometimes. i will upvote ty
Use the following data when needed: ρwater=1000 kg/m^3 , g = 9.80 m/s2 and 1 atm = 1.013 × 105 Pa.

*arrow_forward*

An athlete is training his stamina by pulling a load of 125 kg box at 846 N through a rough surface by a rope at 35.9° above horizontal as shown in Figure 4. Given that the coefficient of kinetic friction between the load and the surface, uk = 0.546
(a) Draw a complete free body diagram of the box(b) Compute the frictional force between the load and the surface(c) Determine the acceleration of the load(d) Without adding additional load, propose a slight modification to the above setting to increase the toughness of the training. Justify your proposal.

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A 1650-kg car is traveling with a speed of 17.9 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 39.5 m?
Number
Type your answer here
Units
Choose your answer here

*arrow_forward*

DYNAMICS OF RIGID BODIES (UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS. NO LONG EXPLANATION NEEDED. ANSWER IN 2 DECIMAL PLACES. BOX THE FINAL ANSWERS.)
PROBLEM #2 (B IS BELOW A)
A BALL IS SHOT AT AN ANGLE OF 53 DEGREES AND HITS THE GROUND AT A POINT 2m LOWER THAN THAT OF THE ORIGIN (START OF MOTION). THE MAXIMUM HEIGHT OF ITS FLIGHT IS ATTAINED 8m AWAY FROM THE ORIGIN.
Determine the following:
a.) FIND THE INITIAL VELOCITY (VO)
b) FIND THE HIGHEST POINT (h) THE BALL REACHED FROM A
c) FIND THE HORIZONTAL DISTANCE (R) COVERED BY THE BALL FROM A TO B
d) FIND THE TIME OF FLIGHT (t) OF THE BALL FROM A TO B

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Given: A, B, and, C are points of contact Weight of bar = 200N Weight of ylinder = 200N
Solve: a) Normal and friction force at A, B, and C (assuming equilibrium)
b) Smallest value of coefficient of friction necessary for equilibrium.
*use 3 decimal places all throughout the solution.

*arrow_forward*

Kindly provide the solution to the following question using the GRASS method. Free Body Diagrams and Problem Solving (Dynamics Unit):
Determine the acceleration of a 55 kg sled coming down a snow hill at 30 degrees to the horizontal ground if the coefficient of friction between the sled and the snow hill is 0.14.
Image attached is a guide on how to use the GRASS method on a question and the other image are the formulas.

*arrow_forward*

DYNAMICS OF RIGID BODIES (UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS. NO LONG EXPLANATION NEEDED. ANSWER IN 2 DECIMAL PLACES. BOX THE FINAL ANSWERS.)
PROBLEM #2 (B IS BELOW A)
A BALL IS SHOT AT AN ANGLE OF 53 DEGREES AND HITS THE GROUND AT A POINT 2m LOWER THAN THAT OF THE ORIGIN (START OF MOTION). THE MAXIMUM HEIGHT OF ITS FLIGHT IS ATTAINED 8m AWAY FROM THE ORIGIN.
Determine the following:
a.) FIND THE INITIAL VELOCITY (VO)
b) FIND THE HIGHEST POINT (h) THE BALL REACHED FROM A

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A 35kg block is pushed with a force of 14.0 N across the floor. The force of friction is 2.0 N.
Draw a FBD of the block.
Calculate the net force acting on the block.
Calculate the acceleration of the block.
Calculate the coefficient of friction between the block and the floor.

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An object of mass 0.5 kg is placed on a rough surface with a coefficient of roughness of 0.2. The object is pulled up an inclined plane as far as 5 meters, determine the smallest force to be able to pull an object as high as 4 meters. explain and illustrate the calculations along with the laws of physics used!

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A 7.3 kg box slides across the floor, experiencing a force of friction of 17.885 N [backward]. Determine the coefficient of kinetic friction between the box and the floor. What are the materials of the box and the floor? (use the chart attached here)
Question 9 options:
Copper and steel
Waxed wood on wet snow
Wood on wood
Rubber on wet concrete
hint μ=FfFg

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An object slides up a 20° slippery incline in dynamic equilibrium due to an applied force of 10.0 N directed parallel to the incline.
Fill out the following table, leaving any quantity that is not given as a variable:
Force
x-component
y-component
Applied
Normal
Weight
ma

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1.55
What is the answer? Use a given-required-solution format. Provide a step by step solution and sketch a free body diagram. Provide a handwritten solution without the use of calculator. Simplify the answer and use a proper unit.

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In designing machinery, would we prefer to use materials with a larger or smaller coefficient of friction? Explain your reasoning

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Two children playing at the beach are pulling on an inner tube. One exerts a force of 75N[N20°E] the other exerts a force of 60N [W]. Ignore friction and calculate net force.
If the inner tube weights 0.5kg, calculate its acceleration

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Related Questions

The coefficient of static friction between a book and the level surface it slides on is 0.65. If the mass of the book is 2.0 kg, what minimum initial applied force is required to slide the books across the surface? Input your answer with correct significant digits and no units.

*arrow_forward*

The systems shown below are in equilibrium with m= 5.20 kg and ? = 28.0°. If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline are frictionless.
Figure (b): A diagonal pulley extends outward from the leftmost edge of a horizontal surface. An object of mass mis suspended from a string which passes over the pulley and anchored at the left end of a spring scale. Another string connects from the right end of the spring scale to a nearby wall.
Figure (d): An object of mass mis positioned upon an inclined plane of angle ?. A string parallel to the incline connects the object to a spring scale which is also parallel to the incline and positioned closer to the top of the incline. The opposite end of the scale is anchored at the incline's highest point.

*arrow_forward*

Three cables are used to hold a hot-air balloon in place. The tension in the cable AD is 658 N.
Draw the Free Body Diagram at A. Upload this along with your all your workings for this problem to the dropbox.
What is the tension in the cable AB? Enter using 3 significant figures.
What is the tension in the cable AC? Enter using 3 significant figures.
What is the vertical force V exerted by the balloon at point A? Enter using 4 significant figures.

*arrow_forward*

The systems shown below are in equilibrium. If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline are frictionless. (Let m = 3.52 kg and θ = 28.0°.)
scale in (a)
N
scale in (b)
N
scale in (c)
N
scale in (d)
N

*arrow_forward*

A rope 17 cm is suspended between two hooks, 13 cm apart and at the same level. What is the pull on each hook, if a weight of 450 N is hanging 5 cm from the right hook?
I didn't understand the previous answer so i had to submit again, please explain it well. Thank you

*arrow_forward*

Applying principles of dynamics (written detailed solutions please :( )
A game requires that two children throw a ball upward as high as possible at the same point and then to run horizontally in opposite directions. The child who travels the greater distance before their thrown ball impacts the ground winds. One child throws the ball at his arm’s height of 4.5 ft at a speed of 69 ft/sec and runs leftward at a speed of 16 ft/sec. The other child does the same but was able to throw better releasing his ball at a heigh of 6 ft at a speed of 71 ft/sec then runs rightward at a speed of 17 ft/sec. Which child wins the game?

*arrow_forward*

answer 5
needs solution/explanation.
please type the solution if you can because i cannot see handwritten sometimes. i will upvote ty
Use the following data when needed: ρwater=1000 kg/m^3 , g = 9.80 m/s2 and 1 atm = 1.013 × 105 Pa.

*arrow_forward*

An athlete is training his stamina by pulling a load of 125 kg box at 846 N through a rough surface by a rope at 35.9° above horizontal as shown in Figure 4. Given that the coefficient of kinetic friction between the load and the surface, uk = 0.546
(a) Draw a complete free body diagram of the box(b) Compute the frictional force between the load and the surface(c) Determine the acceleration of the load(d) Without adding additional load, propose a slight modification to the above setting to increase the toughness of the training. Justify your proposal.

*arrow_forward*

A 1650-kg car is traveling with a speed of 17.9 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 39.5 m?
Number
Type your answer here
Units
Choose your answer here

*arrow_forward*

DYNAMICS OF RIGID BODIES (UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS. NO LONG EXPLANATION NEEDED. ANSWER IN 2 DECIMAL PLACES. BOX THE FINAL ANSWERS.)
PROBLEM #2 (B IS BELOW A)
A BALL IS SHOT AT AN ANGLE OF 53 DEGREES AND HITS THE GROUND AT A POINT 2m LOWER THAN THAT OF THE ORIGIN (START OF MOTION). THE MAXIMUM HEIGHT OF ITS FLIGHT IS ATTAINED 8m AWAY FROM THE ORIGIN.
Determine the following:
a.) FIND THE INITIAL VELOCITY (VO)
b) FIND THE HIGHEST POINT (h) THE BALL REACHED FROM A
c) FIND THE HORIZONTAL DISTANCE (R) COVERED BY THE BALL FROM A TO B
d) FIND THE TIME OF FLIGHT (t) OF THE BALL FROM A TO B

*arrow_forward*

Given: A, B, and, C are points of contact Weight of bar = 200N Weight of ylinder = 200N
Solve: a) Normal and friction force at A, B, and C (assuming equilibrium)
b) Smallest value of coefficient of friction necessary for equilibrium.
*use 3 decimal places all throughout the solution.

*arrow_forward*

Kindly provide the solution to the following question using the GRASS method. Free Body Diagrams and Problem Solving (Dynamics Unit):
Determine the acceleration of a 55 kg sled coming down a snow hill at 30 degrees to the horizontal ground if the coefficient of friction between the sled and the snow hill is 0.14.
Image attached is a guide on how to use the GRASS method on a question and the other image are the formulas.

*arrow_forward*

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Author:Raymond A. Serway, John W. Jewett

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Author:Paul W. Zitzewitz

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

Publisher:OpenStax - Rice University

College Physics

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ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Cengage Learning