In this problem use g = 10m/s^2. The weight of the object is W = mg. 1)Find the work done on the object by the force F. 2) Find the magnitude of the normal force between the object and the floor. Answer in Newton. 3)Find the work done on the object by friction. 4)Find the final kinetic energy of the object. Answer in Joule.
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In this problem use g = 10m/s^2. The weight of the object is W = mg.
1)Find the work done on the object by the force F.
2) Find the magnitude of the normal force between the object and the floor. Answer in Newton.
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Solved in 3 steps
- 1. When is work done on an object? O When a force is applied to an object and the object moves in the same direction as the force When a force is applied on an object and the object remains stationary When the frictional force on an object is greater than a force applied to an object When two forces of equal magnitude are applied to the object in opposite directions2. Page 2 > of 7 F=40 30 In this problem, the block moves in the horizontal direction only. A. Find the work done if the force is applied for a distance of d = 2 m. B. If the mass is m= 6 kg and the initial velocity is V- 0. Use the work-energy theorem to find the final velocity C. If the process in part (B) took a time of t = 0.8s, use your answer from part (B) to Calculate the acceleration of the block. D. Now use Newton's second law ( in the x-direction) to calculate the acceleration. Your answers from Part ( C) and ( D) should be pretty close. They're different Because of rounding errors. dyA 5.40-kg box rests on a horizontal surface. The coefficient of kinetic friction between the box and surface is µk 0.410. A horizontal force pulls the box at constant velocity for 23.0 cm. Find the work done by the applied horizontal force. Submit Answer Tries 0/10 Find the work done the frictional force. Submit Answer Tries 0/10 Find the work done by the net force. Submit Answer Tries 0/10
- A factory worker moves a 21.0 kg crate a distance of 4.80 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.250. 1) What magnitude of force must the worker apply? Express your answer with appropriate units. 2) How much work is done on the crate by the worker's push? Express your answer with appropriate units. 3) How much work is done on the crate by friction? Express your answer with appropriate units. 4) How much work is done by the normal force and by the gravity? Express your answer with appropriate units. 5) What is the net work done on the crate? Express your answer with appropriate units.1.A brick of mass m initially traveling at speed vo slows to a stop while sliding along a rough horizontal surface. m=7.5 kg, vo=25 m/s a)What is the work done by the frictional force in stopping the brick? b)If the brick slides for 33 m before coming to rest, find μk, the coefficient of kinetic friction between the brick and the surface. 2.A variable force acts on a mass of 1.2 kg as it moves in one dimension along the x-axis. The force is position-dependent and is given by the equation: F(x) = (5 N/m) x + 3 N. Assume there are no other forces acting on the mass. a)How much work is done by this force in moving the mass from x = 1 m to x = 4 m? b)If the kinetic energy of the mass is 50 J at x = 1 m, what is the kinetic energy of the mass when it reaches x = 4 m? c)What is the velocity of the mass when it reaches x = 4 m? 4.A puck starts from rest at point A and slides on the frictionless path shown. It is launched horizontally off the end of the track and lands on…Computation. A 6.24-kg snake slithers at constant speed all the way around a circular path of radius 2.37 m. The coefficient of friction between the ground and the snake is 0.32. Determine the work done by friction, W, on the body of the snake. Wf J Record your numerical answer below, assuming three significant figures. Remember to include a "if/when necessary. X
- A 268-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 40.1 ° below the horizontal. The coefficient of kinetic friction is 0.248. What should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero? Number i eTextbook and Media Save for Later Units < 0 Attempts: 0 of 5 used Submit AnswerA m=2.90 kg book is pushed by a completely horizontal force Fa=15.0 N a distance d=0.75m up a frictionless incline of angle theta = 25 as in Figure 1. A. Determine the work done on the book by Fa. B. Determine the work done on the book by the gravity. C. Determine the work done on the normal force. D. Determine the net work done on the book. E. If the initial velocity is vi=0 m/s, determine the final velocity of the book.A car is parked on a hill. The gravitational force on the car is 9.31 x 103 N straight downward, and the angle of the hill is 4° from the horizontal. The car’s brakes fail, and the car slides 30.0 m downhill. a) Calculate the component of the gravitational force that acts parallel to the car’s motion. b) Calculate the work done on the car by gravity as the car slides.
- A woman places a 2 kg block against a horizontal spring of force constant K = 300 N/m and compresses it 9 cm. a) Find the work done by the woman and the work done by the spring.b) The block is released and leaves the spring when the spring is at its original position. Find the speed of the block when it leaves the spring.A box m = 89 kg is being pulled by a constant force F = 116 N at an angle of θ = 21 degrees. The initial speed of the box is zero 1) Write an expression for the work done by force F as the block moves a horizontal distance d. 2) How much work, in joules, was done in moving the block 5.9 m? 3) What is the speed of the box at d = 5.9 m if the surface is frictionless?THANK YOU