A force acting on a particle moving in the xy plane is given by F= (2y + x2), where F is in newtons and x and y are in meters. The particle moves from the origin to a final position having coordinates x = 4.60 m and y = 4.60 m, as shown in the figure below. y (m) x (m) O (a) Calculate the work done by F on the particle as it moves along the purple path (oⒸ). (b) Calculate the work done by F on the particle as it moves along the red path (ODO). (c) Calculate the work done by F on the particle as it moves along the blue path (oⒸ).
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- An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid has a mass of 4.2x 104 kg, and the force causes its speed to change from 7500 to 5000m/s. (a) What is the work done by the force? (b) If the asteroid slows down over a distance of 1.7x 106 m determine the magnitude of the force. (a) Work= (b) F= i iA block of mass m = 2.50 kg is pushed d = 2.70 m along a frictionless horizontal table by a constant applied force of magnitude F = 18.0 directed at an angle ? = 25.0° below the horizontal (a) Determine the work done by the applied force.= J (b) Determine the work done by the normal force exerted by the table.= J (c) Determine the work done by the force of gravity.= J (d) Determine the work done by the net force on the block.= JAn object of mass 3.00 kg is subject to a force E, that varies with the position as in the figure below. (a) Find the work done by the force on the object as it moves from x = 0 to x = 5.00 m. (b) Find the work done by the force on the object as it moves from x = 5.00 m to x = 12.0 m. (c) Find the work done by the force on the object as it moves from x = 12.0 m to x = 17.0 m. (d) If the object has a speed of 0.400 m/s at x 0, find its speed at x = 5.00 m and its speed at x = 17.0 m. F, (N) 4 3 2 x (m) 4 8 10 12 14 16 18 20
- A particle is subject to a force Fx that varies with position as shown. Find the work done by the force on the particle as it moves (a) from x = 0 to x = 5.00 m, (b) from x = 5.00 m to x = 10.0 m, and (c) from x = 10.0 m to x = 15.0 m. (d) What is the total work done by the force over the distance x = 0 to x = 15.0 m?A force of constant magnitude pushes a box up a vertical surface as shown in the figure. The box moves at a constant speed. If the mass of the box is 3.70 kg, it is pushed 3.60 m vertically upward, the coefficient of friction is 0.350 and the angle ? is 30.0°, determine the following. (a) work done on the box by F J(b) work done on the box by the force of gravity J(c) work done on the box by the normal force J(d) increase in gravitational potential energy of the box as it moves up the wall JAn object has several forces acting on it. One of these forces is F=αxyî, a force in the x-direction whose magnitude depends on the position of the object, with α=2.50N/m2. Calculate the work done on the object by this force for the following displacements of the object: (a) the object starts at the point (x=0, y=3.00 m) and moves parallel to the x-axis to the point (x=2.00m, y=3.00m). (b) the object starts at the point (x=2.00m, y=0) and moves in the y-direction to the point (x=2.00m, y=3.00m). (c) the object starts at the origin and moves on the line y=1.5x to the point (x=2.00m, y=3.00m).
- a crate with mass m = 23.9 kg being pushed up an incline that makes an angle φ = 19.2 degrees with horizontal. The pushing force is horizontal, with magnitude P, and the coefficient of kinetic friction between the crate and the incline is μ = 0.337. Consider the work done on the crate as it moves a distance d = 4.34 m at constant speed. Part (a) What is work done by the pushing force, in joules? Part (b) What is the work done by friction, in joules? Part (c) What is the work done by gravity, in joules? Part (d) What is the net work, in joules?You have two vectors: A = 7.27î + 3ĵ and B = 4î - 0.95ĵ + 12k. If vector A represents a force vector and vector B is a displacement vector, what is the magnitude of work done by this force?Total work with vectors
- Two forces F1 = (-1.5i-0.8j+0.7k) N and F2 = (-0.7i+1.2j) N, are applied to a moving object. what is the net force on the object? if the displacement vectoris d= (8.0i+6.0j+5.0k) m, what is the work done by these two forces?A single conservative force acts on a 4.70-kg particle within a system due to its interaction with the rest of the system. The equation Fx = 2x + 4 describes the force, where Fx is in newtons and x is in meters. As the particle moves along the x axis from x = 0.96 m to x = 7.50 m, calculate the following. (a) the work done by this force on the particle 81.488 J (b) the change in the potential energy of the system J (c) the kinetic energy the particle has at x = 7.50 m if its speed is 3.00 m/s at x = 0.96 m JA single conservative force acts on the a 5.0 kg object. The equation Fx = 2x + 4 describes the force, where x is in meters. As the object moves along the x axis from x = 1.0 m to x = 5.0 m calculate the work done by this force.