An applied force of 40.7 N directed at an angle of -18.5 degrees with respect to the +x direction acts on a 2.76 kg mass that is initially at rest while on a horizontal surface. In movir distance of 2.35 m in the +x direction, the object changes its kinetic energy by 38.7 J. What is the coefficient of kinetic friction?

An applied force of 40.7 N directed at an angle of -18.5 degrees with respect to the +x direction acts on a 2.76 kg mass that is initially at rest while on a horizontal surface. In movir distance of 2.35 m in the +x direction, the object changes its kinetic energy by 38.7 J. What is the coefficient of kinetic friction?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter6: Energy Of A System

Section: Chapter Questions

Problem 46P

See similar textbooks

Similar questions

A 4.0-kg particle moving along the x -axis is acted upon by the force whose functional form appears below. The velocity of the particle at x = 0 is v = 6.0 m/s. Find the particle’s speed at x=(a)2.0m, 2.0 (b)4.0 m. (c) 10.0m, (d) Does the particle turn around at some point and head back toward the origin? (e) Repeat part (d) if v = 2.0 m/s at x = 0.
A 5.0-kg box rests on a horizontal surface. The coefficient of kinetic friction between the box and surface is K=0.50 . A horizontal force pulls the box at constant velocity for 10 cm. Find the work done by (a) the applied horizontal force, (b) the frictional force, and (c) the net force.
A boy pulls a bag of baseball bats across a ball field toward theparking lot. The bag of bats has a mass of 6.80 kg, and the boyexerts a horizontal force of 24.0 N on the bag. As a result, the bagaccelerates from rest to a speed of 1.12 m>s in a distance of 5.25 m.What is the coefficient of kinetic friction between the bag and theground?
An applied force of 44 N directed at an angle of -18.3 degrees with respect to the +x direction acts on a 2.89 kg mass that is initially at rest while on a horizontal surface. In moving a distance of 2.96 m in the +x direction, the object changes its kinetic energy by 30.2 J. What is the coefficient of kinetic friction?
A constant net force of 60.0 N acts on an object initially at rest and acts through a parallel distance of 0.77m. If the object has a mass of 0.19 kg, what is its final speed?
An applied force of 14.3 N acts on a 2.50 kg mass that is initially at rest. Over a distance of 2.18 m, the object changes its kinetic energy by 19.2 J. What is the coefficient of kinetic friction?
a mother and her child are skiing together, and the mother is holding the end of a rope tied to the child's waist. They are moving at a speed of 7.2 kph on a gently sloping portion of the ski slope when the morher observes that they are approaching a steep descrnt. She pulls on the rope with an average force of 15 N. Knowing the coefficient of frivtion between the mother and the ground is 0.2, the mass of the mother is 62 kg and the angle of the rope does not change, determine the acceleration of the mother, the time reuired dor the mother's speed to be cut in half, and the distance traveled.
A warehouse worker is pushing a 90.0 kg crate with a horizontal force of 276N at a speed of v = 0.875m/s across the warehouse floor. He encounters a rough horizontal section of the floor that is 0.75 m long and where the coefficient of kinetic friction between the crate and floor is 0.353. (a) Determine the magnitude and direction of the net force acting on the crate while it is pushed over the rough section of the floor. magnitude Ndirection ---Select--- up down in the same direction as the motion of the crate in the opposite direction as the motion of the crate (b) Determine the net work done on the crate while it is pushed over the rough section of the floor. J (c) Find the speed of the crate when it reaches the end of the rough surface. m/s
A 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. Thecoefficients of static and kinetic friction between the puck and the ramp are μs = 0.40 andμk = 0.30, and the puck’s initial velocity at the base is 3.8 m/s parallel to the sloping surfaceof the ramp. What speed does the puck have when it slides back down to its starting point?
The 70.0-kg swimmer shown starts a race with an initial velocity of 1.25 m/s and exerts an average force of 80.0 N backward with his arms during each 1.80 m long stroke. (a) What is his initial acceleration if water resistance is 45.0 N? (b) What is the subsequent average resistance force from the water during the 5.00 s it takes him to reach his top velocity of 2.50 m/s? (c) Discuss whether water resistance seems to increase linearly with velocity.
A warehouse worker is pushing a 90.0 kg crate with a horizontal force of 300 N at a speed of v = 0.850 m/s across the warehouse floor. He encounters a rough horizontal section of the floor that is 0.75 m long and where the coefficient of kinetic friction between the crate and floor is 0.360. m (a) Determine the magnitude and direction of the net force acting on the crate while it is pushed over the rough section of the floor. magnitude Have you drawn a force diagram and identified all forces acting on the crate? N direction --Select-- X Have you drawn a force diagram and identified all forces acting on the crate? (b) Determine the net work done on the crate while it is pushed over the rough section of the floor. Can you write an expression for the net work done on the crate in terms of the net force acting on the crate? J (c) Find the speed of the crate when it reaches the end of the rough surface. Can you develop an expression for the final speed of the crate in terms of its initial…
A warehouse worker is pushing a 90.0 kg crate with a horizontal force of 283 N at a speed of v = 0.875 m/s across the warehouse floor. He encounters a rough horizontal section of the floor that is 0.75 m long and where the coefficient of kinetic friction between the crate and floor is 0.354. (a)Determine the magnitude and direction of the net force acting on the crate while it is pushed over the rough section of the floor. (b) Determine the net work done on the crate while it is pushed over the rough section of the floor. (c) Find the speed of the crate when it reaches the end of the rough surface.