Posts by NHS
Total # Posts: 8
In a supermarket parking lot, an employee is pushing ten empty shopping carts, lined up in a straight line. The acceleration of the carts is 0.080 m/s2. The ground is level, and each cart has a mass of 25 kg. (a) What is the net force acting on any one of the carts? N (b) ...
A box is sliding up an incline that makes an angle of 17.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.40 m/s. How far does the ...
A passenger is pulling on the strap of a 13.5-kg suitcase with a force of 67.0 N. The strap makes an angle of 34.0° above the horizontal. A 37.8-N friction force opposes the motion (horizontal) of the suitcase. Determine the acceleration of the suitcase.
A 8.70-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.400. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, N (b) accelerating upward with an ...
A 51.0 kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.710 and 0.440, respectively. (a) What horizontal pushing force is required to just start the crate moving? N (b) What horizontal pushing force is required to slide ...
A 72.0-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.80 m/s2, N (b) moving upward at a constant speed, and N (c) accelerating downward with an acceleration of 1.30 m/s2? N I just ...
Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 1.60 m. Two of the spheres have a mass of 2.20 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that ...
that would be (-4-6i)^2 as i would equal squareroot(-1), the answer can be found using foil, or just typing that in a graphing calculator