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Giambattista et al - College Physics 4/e (Homework)

James Finch

Physics - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 2 / 12

Due : Monday, January 28, 2030 00:00 EST

Last Saved : n/a Saving...  ()

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–/2 1/1 1/1 0/1 –/1 –/3 –/3
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2/12 (16.7%)

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    Here are some textbook questions from College Physics 4/e by Alan Giambattista, Betty McCarthy Richardson and Robert C. Richardson published by McGraw-Hill. Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions and allows you to try another version of the same question for practice wherever the problem has randomized values.

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1. –/2 points GRRColPhys4 2.P.078. My Notes
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A horse is trotting along pulling a sleigh through the snow. To move the sleigh, of mass m, straight ahead at a constant speed, the horse must pull with a force of magnitude T. (Use any variable or symbol stated above along with the following as necessary: g for the acceleration due to gravity.)
(a) What is the net force acting on the sleigh?
Fnet =


(b) What is the coefficient of kinetic friction between the sleigh and the snow?
μk =
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2. 1/1 points  |  Previous Answers GRRColPhys4 2.MC.004. My Notes
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1/1
 
Your car won't start, so you are pushing it. You apply a horizontal force of 300 N to the car, but it doesn't budge. What force is the interaction partner of the 300-N force you exert?
     Correct: Your answer is correct.
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3. 1/1 points  |  Previous Answers GRRColPhys4 2.MC.009. My Notes
Question Part
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1/1
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1/1
 
Vector
A
 in the drawing is equal to which of the following?

     Correct: Your answer is correct.
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4. 0/1 points  |  Previous Answers GRRColPhys4 2.P.011. My Notes
Question Part
Points
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1
0/1
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0/1
 
Rank the vectors
D,
E,
 and
F
 in order of increasing magnitude. (Use only "<" or "=" symbols. Do not include any parentheses around the letters or symbols.)
Incorrect: Your answer is incorrect.
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5. –/1 points GRRColPhys4 2.P.032. My Notes
Question Part
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A person stands on the ball of one foot. The normal force due to the ground pushing up on the ball of the foot has magnitude 630 N. Ignoring the weight of the foot itself, the other significant forces acting on the foot are the tension in the Achilles tendon pulling up and the force of the tibia pushing down on the ankle joint. If the tension in the Achilles tendon is 2,170 N, what is the force exerted on the foot by the tibia? (Enter the magnitude only.)
N
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6. –/3 points GRRColPhys4 2.P.072. My Notes
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–/3
 
A crate of potatoes of mass 16.5 kg is on a ramp with angle of incline 30° to the horizontal. The coefficients of friction are μs = 0.75 and μk = 0.40. Find the normal force (magnitude) on the crate if the crate is at rest.
N

Find the frictional force (magnitude and direction) on the crate if the crate is at rest.
magnitude     N
direction     
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7. –/3 points GRRColPhys4 2.P.081. My Notes
Question Part
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1 2 3
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–/3
 
A conveyor belt carries apples up an incline to a cider press. The apples neither slide nor roll as they move up the incline.
(a) Does the belt exert a static or kinetic frictional force on an apple? Explain.
    

(b) If the normal and frictional forces exerted on an apple have magnitudes 1.4 N and 0.38 N, respectively, what (if anything) can you conclude about the static and kinetic coefficients of friction? (If an answer cannot be found from the given information, enter DNE.)
μs ≥
μk ≥
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