2. Tom is tasked to bring a block of wood on top of a hill. Due to his small physique, he cannot carry it. He then decided to push its way up the hill. He is exerting 100 N force on a 300 N wood block on a hill. The coefficients of friction between the block and the surface of the hill are μ = 0.25 and μ = 0.20. Determine whether the block is moving or not. Explain your answer. 100 N 5 4 300 N

2. Tom is tasked to bring a block of wood on top of a hill. Due to his small physique, he cannot carry it. He then decided to push its way up the hill. He is exerting 100 N force on a 300 N wood block on a hill. The coefficients of friction between the block and the surface of the hill are μ = 0.25 and μ = 0.20. Determine whether the block is moving or not. Explain your answer. 100 N 5 4 300 N

Name: KINDLY answer this ASAP! 2. Tom is tasked to bring a block of wood on
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Description: KINDLY answer this ASAP! 2. Tom is tasked to bring a block of wood on top of a hill. Due to his small physique, he cannotcarry it. He then decided to push its way up the hill. He is exerting 100 N force on a 300 Nwood block on a hill. The coefficient

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 90P: (a) What is the final velocity of a car originally traveling at 50.0 km/h that decelerates at a rate...

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(a) What is the maximum frictional force in the knee joint of a person who supports 66.0 kg of her mass on that knee? (b) During strenuous exercise, it is possible to exert forces to the joints that are easily 10 times greater than the weight being supported. What is the maximum force of friction under such conditions? The frictional forces in joints are relatively small in all circumstances except when the joints deteriorate, such as from injury or arthritis. Increased frictional forces can cause further damage and pam.
(a) What is the final velocity of a car originally traveling at 50.0 km/h that decelerates at a rate of 0.400m/s2for 50.0 s? Assume a coefficient of friction of 1.0. (b) What is unreasonable about the result? (c) Which premise is unreasonable, or which premises are inconsistent?
Consider the figure shown in the following figure. You are loweringtwo boxes, one on top of the other, down a ramp by pulling on a ropeparallel to the surface of the ramp. Both blocks move with constantvelocity of 10.0 [m/s]. The coefficient of kinetic friction between theramp and the lower box is 0.555 and the coefficient of static frictionbetween the two boxes is 0.750. A. Draw the Free-Body diagram of both blocks. Set the ?-axis parallel to the ramp. B. Write Newton’s 2nd law along the ? and ? directions for both blocks considering their state of motion (accelerations). C. What are the magnitude and direction of the frictional force on the upper box? D. What is the magnitude of the applied force? E. Determine the angle at which the top block will start to slide down the bottom block.
Consider the figure shown in the following figure. You are loweringtwo boxes, one on top of the other, down a ramp by pulling on a ropeparallel to the surface of the ramp. Both blocks move with constantvelocity of 10.0 [m/s]. The coefficient of kinetic friction between theramp and the lower box is 0.555 and the coefficient of static frictionbetween the two boxes is 0.750. A. Draw the Free-Body diagram of both blocks. Set the ?-axis parallel to the ramp. B. Write Newton’s 2nd law along the ? and ? directions for both blocks considering their state ofmotion (accelerations). C. What are the magnitude and direction of the frictional force on the upper box? D. What is the magnitude of the applied force? E. Determine the angle at which the top block will start to slide down the bottom block.
A block with a mass (m) of 74.7 kg slides along a horzontal surface. the coefficent of kinetic friction is .31. THe block has an ititial speed (v0) at 11.6m/s in the positive direction. 1) write and expression for the x component of the frictional force of the block experiences Ff in terms of the given variables and variables avaible. 2) what is the magnitude of the frictional force? 3) how for will the block travel before coming to rest.
14. A 25.0 kg girl goes down a slide at an amusement park, reaching the bottom. The slide is 10.0m long and the top end is 3.00m above the ground, bottom is 0.30m above the ground. The coefficient of friction between the girl and the slide is 0.150. What velocity will she exit, at the bottom of the slide. Draw a FBD, explain what you are doing h₁
An object with a mass of 1.76 kg is initially at rest upon a horizontal, frictionless surface. An applied force of 3.04 N i acts on the object for 2.08 s. What is the object's final speed? Enter a number rounded to 2 decimal places and assume the answer has proper SI Units.
1)A shingle slides down a roof having a 30 angle and falls off with a speed of 2.0 m/s.a. How long will it take to hit the ground?b. Calculate the highest point reached by it. 2)A 20.0 kg trunk is pushed across the floor of a moving van by a horizontal force. If thecoefficient of kinetic friction between the trunk and the floor is 0.255, what is the magnitudeof the frictional force opposing the applied force?
Santa Clause is about to distribute his gifts, but his reindeer Rudolph is still sleepy. So, instead of flying they use the ground and cross a 20-m-long bridge. Starting from rest, Rudolph pulls Santa and his sleigh, with a force F 30° above the horizontal against a frictional force of 80N. 1. Draw an appropriate free body diagram to represent all the forces acting on Santa and his sleigh. 2. Suppose the combined mass of Santa, his sleigh, and his gifts is 500kg. What is the magnitude of Fif the acceleration of Santa and his sleigh is 1.5 meters per second squared? 3. How much work is done by Rudolph in pulling Santa and his sleigh in crossing the bridge? 4. What is the change in the kinetic energy of Santa and his sleigh after crossing the bridge? 5. How fast are they moving at the end of the bridge?
An empty sled of mass 25 kg slides down a muiddy hill with a constant speed of 2.4 m/s The slope of the hill is inclined at an angle of 15 degrees with the horizontal. a. Calculate the frictional force on the sled as it slides down the slope b.Calculate the coefficient of friction between the sled and the muddy surface of the slope c. The sled reaches the bottom of the slope and continues of horizontal ground. Assume the same coefficient of friction. In terms of velocity and acceleration, describe the motion of the sled as it travels on horizontal ground.
A 2234 kg car is traveling at 30.0 m/s on a flat surface. It encounters an incline angled at 15 degrees. It starts coasting up the hill. There is a coefficient of friction of 0.162. A) How far up the hill does the car coast before stopping? B) How fast is the car from before traveling after it rolls back down to the bottom of the incline?
A box of weight W is pushed downwards a rough inclined plane (kinetic friction coefficient u) with an initial velocity v0. W a) Determine the velocity in dependence on the distance. b) At what distance xg the box comes to rest? I Under what circumstances does motion occur?