Problem: A 50kg block is pulled up by a tensile force a 175N and pushed up by a force F= 200N   both applied parallel to the plane of contact. If the block is moved up an inclined plane at 30 degrees with height of 20m. use coefficient of friction 0.20 Determine: a) frictional force (in Newton) b) work done by the friction c) work done by the tension d) total work done e) rate of work if work was done in 20seconds (express answer in Joule/s)   *answer with complete solution *THREE decimal places all final answer *DRAW a diagram with proper labels *use value of gravity (9.81) *enclose all final answers with a box

Problem 5 A child applies a force F? parallel to the x -axis to a 10.0-kg sled moving on the frozen surface of a small pond. As the child controls the speed of the sled, the x-component of the force she applies varies with the x-coordinate of the sled as shown in the picture (a) Calculate the work done by the force F? when the sled moves from x=0 to x=8.0m. (b) from x = 8.0 m to x = 12.0 m; (c) from x = 0 to 12.0 m. Figure 1 Fx (N) 10 5 of 1 0 4 8 < 12 x (m)

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?

1- An object is constrained to move inside a vertical ring near the surface of Earth as shown in the picture. Answer the following questions: What are the forces acting on the object b) is the work done by each force zero, positive or negativel S

1) In the formula given for the calculation of work, the variable F represents: A) The angular coordinate of the vector d when it is written in polar coordinates B) The scalar magnitude of the force doing work C) The angular coordinate of the vector F when it is written in polar coordinates D) The scalar magnitude of the displacement through which the system moves while the force isapplied E) The direction of the force acting on the system F) The angular difference between the vectors F and d G) The diameter of the system H) The weight, or force due to gravity, on the system I) The work done by the force F 2) In the formula given for the calculation of work, the variable d represents: A) The angular coordinate of the vector d when it is written in polar coordinates B) The scalar magnitude of the force doing work C) The angular coordinate of the vector F when it is written in polar coordinates D) The scalar magnitude of the displacement through which the system moves while the force…

4 A cable exerts a constant upward tension of magnitude 1.38 x 10" N on a 1.20 x 10 kg elevator as it rises through a vertical distance of 3.50 m. HINT (a) Find the work done by the tension force on the elevator (in J). (b) Find the work done by the force of gravity on the elevator (in J).

A horizontal force of 150 N is applied to push a 40.0 kg box a distance 6.00 m on a rough horizontal surface. If the box moves quickly constant, determine: A. The work that reverses the 150 N force. B. The coefficient of kinetic friction between the box and the surface.

If an object is moved a distanced up an inclined plane at an angle of θ with respect to the horizontal, the normal force from the plane on the object is FN=mgcosθ. What is the work done by the normal force during this motion? A) (mgcosθ)d B) (−mgcosθ)d C) 0 D)mgd E)−mgd

QUESTION 16 A crate of mass, m, slides down a plane inclined at an angle, 0, to the horizontal for a distance x down the incline. If the coefficient of kinetic friction between the inclined surface and the crate is µk. what is the work done by friction? a. -Hkmgxcose b. -mgxcose C. -mgxcose/µk d. -µkmgxtane e. -mgxsin0

3. A cylindrical spring is found to elongate by 3 cm when stretched by a force of 500N. Determine: a. its force constant b. the work done by a 600N force in elongating the spring c. the elongation if a 100-kg mass is hung on the spring