A person pushes a box of mass m = 25 kg in a straight line along a rough floor. The applied force F has magnitude 85 N and acts downward at an angle 0 = 10° with respect to the horizontal, as shown below. The box is initially at rest at the position x, = 0 m, and it has speed v2 = 0.55 m/s at position x2 = 3.50 m. a). Find the coefficient of friction between the box and the floor. b). What is the net work done? c). How much work (magnitude and sign) is done by the friction force? (This problem involves constant acceleration, Newton's Laws, and work!)

A box of mass m = 20.0 kg is pulled up a ramp that is inclined at an angle 0 15.0° angle with respect to the horizontal. The coefficient of kinetic friction between the box and the ramp is µk = 0.285, and the rope pulling the box is parallel to the ramp. If the box accelerates up the ramp at a rate of a 2.89 m/s?, calculate the tension Fr in the rope. Use g = 9.81 m/s² for the acceleration due to gravity. FT = 150.95 N

Determine the force Q-> when the block moves with constant velocity. Express your answer in vector form.

The block shown in the figure is sliding along a frictionless horizontal surface The block's mass is m = 4.80 kg,the magnitude of the applied force is F = 26.5 N, and the angle of the applied force F from the horizontal is θ = 28.0°.     Determine the magnitude n of the normal force acting on the block.

A block of mass 4.6 kg is sliding down a ramp with an initial speed of 1.5 m/s. The ramp is inclined from the horizontal by an angle theta = 34.9 degrees and the coefficient of kinetic friction is  uk = 0.73. What is the magnitude of the displacement of the block along the ramp from the initial time until it stops?

A 2.30 kg block is initially at rest on a horizontal surface. A horizontal force of magnitude 5.92 N and a vertical force are then applied to the block (see the figure). The coefficients of friction for the block and surface are us = 0.4 and Uk = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of P is (a)7.00 N and (b)10.0 N. (The upward pull is insufficient to move the block vertically.) (a) Number i (b) Number i Units Units P € }

A woman pushes a 10.0 kg box across a horizontal floor with a constant force of magnitude 40.0 N directed at an angle of -25° with respect to the positive x-axis. The box moves horizontally to the right. At the origin (x=0) the box has an initial speed of 4.00 m/s and the woman pushes it to a location ofx=3.00 m. what is the force of the woman? what is the force of gravity? what is the normal force of the floor?

A 2.60 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 7.29 N and a vertical force P are then applied to the block (see the figure). The coefficients of friction for the block and surface are us = 0.4 and Pk = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of P is (a)6.00 N and (b)8.00 N. (The upward pull is insufficient to move the block vertically.) (a) Number Units (b) Number Units

Time left 0:20:32 An amusement park in Dubai has a ramp which is frictionless. A child drops a smooth object and it slides down the ramp and comes down through a height 4 m. What distance is necessary to stop the object on the flat track if the coefficient of friction is 0.4? h. Answer:

You are driving through the Ouachita Mountains at 12m/s. You see a maple-leaf oak (Quercus acerifolia) crossing the road and hit the brakes, 20m away. The coefficient of kinetic friction between your tires and the road is μ_k = 0.7. Will you strike this endangered broadleaf? Justify your answer with a calculation.Your final answer should be the distance you will travel before coming to a stop.