Mary applies a force of 70 N to push a box with an acceleration of 0.60 m/s2. When she increases the pushing force to 82 N, the box's acceleration changes to 0.80 m/s2. There is a constant friction force present between the floor and the box. The mass of the box in kilograms is 60. What is the coefficient of kinetic friction between the floor and the box?

Mary applies a force of 70 N to push a box with an acceleration of 0.60 m/s2. When she increases the pushing force to 82 N, the box's acceleration changes to 0.80 m/s2. There is a constant friction force present between the floor and the box. The mass of the box in kilograms is 60. What is the coefficient of kinetic friction between the floor and the box?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter5: Newton's Laws Of Motion

Section: Chapter Questions

Problem 35PQ: A black widow spider hangs motionless from a web that extends vertically from the ceiling above. If...

See similar textbooks

Similar questions

Mary applies a force of 77 N to push a box with an acceleration of 0.55 m/s2. When she increases the pushing force to 85 N, the box's acceleration changes to 0.71 m/s2. There is a constant friction force present between the floor and the box. (a) What the mass of the box in kilograms? kg (b) What is the coefficient of kinetic friction between the floor and the box?
Mary applies a force of 70 N to push a box with an acceleration of 0.60 m/s2. When she increases the pushing force to 82 N, the box's acceleration changes to 0.80 m/s2. There is a constant friction force present between the floor and the box. What is the mass of the box in kilograms?
Mary applies a force of 71 N to push a box with an acceleration of 0.45 m/s2. When she increases the pushing force to 79 N, the box's acceleration changes to 0.63 m/s2. There is a constant friction force present between the floor and the box. (a)What is the mass of the box in kilograms? ?kg (b)What is the coefficient of kinetic friction between the floor and the box?
A large crate has a mass of 120 kg and sits on a horizontal floor. You push on the crate with a horizontal force of 550 N, but the crate does not move. The coefficient of static friction between the crate and the floor is 0.6. What is the magnitude of the static frictional force acting on the crate?
A child pulls a 20 kg sled with a rope that makes an angle of 30° with the ground. The tension in the rope is 60 N. The coefficient of friction between the sled and the snow is 0.1. What is the acceleration of the sled?
Just like Louis, Maria left a book on the roof of her car before driving away. The mass of the book was 731 grams. The coefficient of static friction between the book and the roof was 0.29. The coefficient of kinetic friction between the book and the roof was 0.24. Maria started her car and drove forward on level ground with an acceleration of 3.5 m/s?. As Maria was driving away with that acceleration, what was the magnitude of the force of friction (in newtons) between the book and the roof of the car?
Tim got a huge birthday gift from his grandmother. A 400. N crate has been delivered to his driveway. In order to get it started moving toward his door, he has to push it with a horizontal force of 250 N, but as soon as it is moving, he can keep it moving at a constant speed by pushing with a 120 N force. What are the coefficients of static and kinetic friction of Tim's birthday gift and the driveway?
You managed to pull a heavy crate up a ramp on a truck. The crate has mass 45 kg. You were pulling with 478 N of force along the ramp while the ramp made an angle of theta=25.5 degrees with the horizontal. The coefficient of kinetic friction between the crate and the ramp is 0.47. What is the acceleration of the crate along the ramp?
A large block of ice is being pulled across a frozen lake. The block of ice has a mass of 300 kg. The coefficient of friction between two ice surfaces is small: μk = 0.05. What is the force of friction that is acting on the block of ice?
Mary applies a force of 71 N to push a box with an acceleration of 0.52 m/s². When she increases the pushing force to 81 N, the box's acceleration changes to 0.68 m/s2. There is a constant friction force present between the floor and the box. (a) What is the mass of the box in kilograms? kg (b) What is the coefficient of kinetic friction between the floor and the box? Additional Materials Reading
Mary applies a force of 78 N to push a box with an acceleration of 0.40 m/s2. When she increases the pushing force to 90 N, the box's acceleration changes to 0.66 m/s?. There is a constant friction force present between the floor and the box. (a) What is the mass of the box in kilograms? kg (b) What is the coefficient of kinetic friction between the floor and the box?
A 5000 kg lorry gradually accelerates from rest. There is a box of mass 200 kg on the back of the lorry. The box is not tied to the lorry. The lorry accelerates from rest to a speed of 15 m/s over a certain distance. The maximum frictional force between the lorry and the box is 630 N. The maximum acceleration (in m/s^2) that the lorry can have without the box falling off is: