Answer : 5. -2mgD
Explanation :
From A to B the work done by friction force is -mgD and B to A the work done by friction force is -mgD too since work done by kinetic energy is also negtive. so the total work done by friction is sum of these two works and we get W = -2mgD
014 10.0 points A block of mass m is pushed a horizontal dis- tance D from...
A block of mass 2.50 kg is pushed 2.20 m along a frictionless horizontal table by a constant 10.0 N force directed 25.0° below the horizontal. Determine the work done by the applied force. (a) 51.9 J (b) 19.9 J (c) 93.4J (d) 31.4J (e) 1.19J
A block with a mass of 32.5 kg is pushed with a horizontal force of 150 N. The block moves at a constant speed across a level, rough floor a distance of 6.50 m. (a) What is the work done (in J) by the 150 N force? J (b) What is the coefficient of kinetic friction between the block and the floor?
A block of mass m 3.90 kg is pushed a distance d = 5.90 m along a frictionless, horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle θ = 30.0° below the horizontal as shown in the figure below. (a) Determine the work done on the block by the applied force (b) Determine the work done on the block by the normal force exerted by the table. c) Determine the work done...
A block of mass m = 5.00 kg is pushed a distance d = 3.00 m along a frictionless, horizontal table by a constant applied force of magnitude F = 20.0 N directed at an angle theta = 37.0 degree below the horizontal as shown in Figure. Determine the work done on the block by (a) the applied force, (b) the normal force exerted by the table, (c) the gravitational force, and (d) the net force on the block.
A 2.7 kg block initially in motion is pushed along d horizontal oor by d orce of magnitude 20 N at an angle θ 35 with the horizontal. The coefficient o kinetic friction between the block and floor s 0.25 (a) Calculate the magnitude of the frictlonal force on the block from the floor. (b) Calculate the magnitude of the block's acceleration n/s2
A m= 2.00 kg block is pushed against a spring with negligible mass and force constant k= 300. N/m, compressing it d= 0.250 m. When the block is released, it moves along a frictionless, horizontal surface and then up an incline with slope 37.0° and a coefficient of kinetic friction of 0.320. A)What is the speed of the block as it slides along the horizontal surface after having left the spring?B) How far does the object travel up the incline before...
Please solve this problem using vectors. Please describe everything in detais. Thanks A block of mass 55 kg is pushed 12 m along a slope with an upward incline of 30 The force pushing the block up the slope has a horizontal component of 30 N and a vertical component of zero (a) Calculate the work done by the force in pushing the block. (b) Assuming that the block begins at rest, and that there is no friction, calculate the...
Q1-(25 pts) A block of mass m is on a horizontal surface and is attached to a spring whose other end is fixed. The spring constant is k. The coefficient of kinetic friction between the block and the horizontal surface is u. A force Facts on the block always making an angle with the horizontal, as shown in the figure. The magnitude of the force is adjusted so that the block moves with constant speed v on the surface from...
An object with mass m is dragged along a horizontal plane by a force acting along a rope attached to the object as shown below mass horizontal plane If the rope makes an angle θ with the plane, then the magnitude of the force required to overcome friction is where g is the acceleration due to gravity and μ is a positive constant called the coefficient of riction, and we assume θ [0, π/2) Use the second derivative t tan...
A 25 NN block is pushed up a frictionless 33º inclined Plane by a horizontal force of 120 NN applied parallel to the ground. The block is moved 10 m along the plane. 1. Find the work done by the weight of the block. 2. Find the work done by the normal force. XV F