A child’s wagon with rubber tires is being pulled along a street. The wagon and its load have a combined mass of 28.0 kg. The coefficient of friction for rubber on dry asphalt is 1.07. a) Find the force of friction. b) How large must the pulling force be in order to get the wagon to accelerate at 0.50 m/s2 [forward]? c) Assuming that the wagon starts from a rest position, find its velocity after 22.0 s

Question 2.20 in the image.

Commercial airplanes are sometimes pulled out of the passenger loading area by a tractor. a) An 1800 kg tractor exerts a force of 1.75 × 104 N backward on the pavement, and the system experiences forces resisting motion that totals 2400 N. If the acceleration is 0.14 m/s2, what is the mass of the airplane in kilograms?  b)

A box is placed in the bed of a pick-up truck or similar flat-bed vehicle.  What the maximum acceleration the truck can undergo for which the block does not slide on the flat vehicle bed?  The coefficient of static friction is mu, the vehicle mass is massvehicle, and the box mass is mbox.  Derive an expression for max vehicle acceleration in terms of mu, gravitational acceleration, mvehicle, and mbox.  Note that your derived expression may not contain all of these terms.

1.3 f a system is isolated: a. The velocities of all objects must sum to exactly zero. b. Sum of all the forces must be 3.14159 Newtons c. The vector sum of all external forces acting on the system must be zero. d. It will interact with the external environment.

Suppose an airline allows a maximum of 27 kg for each suitcase a passenger brings along. (a) What is the weight in newtons of a 27 kg suitcase? N (b) What is the weight in pounds? Ib

The maximum applied force a plastic grocery bag can withstand before ripping is 245N. If of 19.0 kg groceries are lifted up from the floor to the table with an acceleration of 2.3 m/s? , will the bag rip? Include a FBD. Paragraph U v

(a) What is the coefficient of kinetic friction between the crate and the floor? (Enter your answer to at least three decimal places.) (b) If the 250-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in the figure b, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a). m/s2

A 7.62-kg box is pulled along a horizontal surface by a 75.8-N force applied at a 15.1 degree angle above the horizontal. The coefficient of kinetic friction between the box and the surface is 0.209. Calculate the acceleration (in m/s2).

An 800 kg car exerts 4000N of applied force on a level road while being opposed by 700 N of friction. Determine the acceleration of the car.