wo blocks are connected by a very light string passing over a massless and frictionless pulley. Traveling at constant speed, the 20.0 N block moves 75.0 cm to the right and the 12.0 N 20.0 N 12.0 block moves 75.0 cm downward. How much work is done on the 20.0 N block by (i) the tension in the string, (ii) friction, and (iii) the normal force? (b) Find the total work done on each block.

A particle is subject to a force F, that varies with position as shown in the following figure. F, (N) 3 1 x (m) 2 4 6 8 10 12 14 16' (a) Find the work done by the force on the particle as it moves from x = 0 to x = 2.00 m. (b) Find the work done by the force on the particle as it moves from x = 5.00 m to x = 7.00 m. (c) Find the work done by the force on the particle as it moves 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?

Starting from rest, a 4.20-kg block slides 3.40 m down a rough 30.0° incline. The coefficient of kinetic friction between the block and the incline is  μk = 0.436. (a) Determine the work done by the force of gravity. J(b) Determine the work done by the friction force between block and incline. J(c) Determine the work done by the normal force. J(d) Qualitatively, how would the answers change if a shorter ramp at a steeper angle were used to span the same vertical height?

To push a 26.0 kg crate up a frictionless incline, angled at 25.0° to the horizontal, a worker exerts a force of 209 N parallel to the incline. As the crate slides 1.6 m, how much work is done on the crate by (a) the worker's applied force, (b) the gravitational force on the crate, and (c) the normal force exerted by the incline on the crate? (d) What is the total work done on the crate? (a) Number i Units (b) Number i Units (c) Number i Units (d) Number i Units > > >

An airplane flies 200 m at a constant altitude in a direction 30.0° south of east. A wind is blowing that results in a net horizontal force on the plane due to the air of 3.0 N in a direction 30.0° north of west. How much work is done on the plane by the air?

An object of mass  5 kg is pulled by a constant force of 6.2 N at an angle of 350 above the horizontal through a  distance  of 7 m. What is the work done on the object? Neglect friction.  An object of mass  5 kg is pulled by a constant force of 6.2 N at an angle of 350 above the horizontal through a  distance  of 7 m. What is the work done on the object? Neglect friction.  55 J 46 J 43 J 36 J

1. A factory worker pushes forward and down, at an angle of 30° to the horizontal, a 40 kg box at a distance of 5 m along a level floor, at a constant speed. The coefficient of friction between the box and the floor is 0.25. (a) What force is required? (b) How much work is done by the workman? By the friction force? 2. A 12 kg block is pushed 20 m up the sloping surface of a plane inclined at an angle of 37° to the horizontal by a constant force F of 120 N acting parallel to the plane. The coefficient of friction between the block and plane is 0.25, and the block starts at rest. a. What is work done by the force F? b. Compute the increase in kinetic energy of the block. C. Compute the increase in potential energy of the block. d. Compute the work done by the friction force.

A loaded grocery cart is rolling across a parking lot in a strong wind. You apply a constant force F⃗ =(34N)i^−(44N)j^ to the cart as it undergoes a displacement s⃗ =(−8.6m)i^−(3.5m)j^.  How much work does the force you apply do on the grocery cart?

A 3.54 kg object has three forces that act on it as it moves 5.35 m in the negative x-direction, starting from rest. The three forces that act on the object are described in the table below: Force Force 19.91 N Force 2 34.7 N Force 3 49.5 N |magnitude direction |along the positive x-axis |along the negative y-axis |44.5 degrees above the -x-axis a. Determine the work done by each of the forces. i. Work done by Force 1 ii. Work done by Force 2 iii. Work done by Force 3 J J J b. What is the net work acting on the object? J c. Using work and kinetic energy ideas (Unit 7), what is the speed of the object after it has moved 5.35 m? m/s

A block of mass m = 3.75 kg is pushed a distance d = 5.55 m along a frictionless horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle = 34.0° below the horizontal as shown in the figure below. m (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 on the block by the force of gravity. (d) Determine the work done by the net force on the block.