Three clowns move a 285 kg crate 10.5 m to the right across a smooth floor. Take the positive horizontal and vertical directions to be right and up, respectively. Moe pushes to the right with a force of 555 N , Larry pushes to the left with 325 N , and Curly pushes straight down with 505 N . Calculate the work ? done by each of the clowns. Assume friction is negligible. ?Moe= J ?Larry= J ?Curly= J

A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 66 kg, and the height of the water slide is 11.1 m. If the kinetic frictional force does -6.4 × 103 J of work, how fast is the student going at the bottom of the slide? vf = Type your answer here Choose your answer here

A man pushes a 85.9-N crate a distance of 3.7 m up a long frictionless ramp at a constant speed.  His pushing force is parallel to the ramp.  The ramp makes a 30.0-degree angle with the horizontal.  What is the work done by the man in pushing the crate? Give your answer in joules, rounded to one decimal place.

Two forces F1 = (-1.5i-0.8j+0.7k) N and F2 = (-0.7i+1.2j) N, are applied to a moving object. what is the net force on the object? if the displacement vectoris d= (8.0i+6.0j+5.0k) m, what is the work done by these two forces?

The overworked Amazon delivery person is driving up a steep hill with an incline of 26° when a box they forgot to secure starts sliding toward the back of the truck. The 3.5 kg box starts from rest near the drivers seat and slides 2.1 m along the floor to the rear door. The coefficient of kinetic friction between the box and the floor is 0.36. What is the work done by the weight of the box? Wmg 31.6 J What is the work done by the Normal Force? WN = 0 What is the work done by the frictional force? Wfk = 23.31 What is the net work done on the box? Wnet What is the change in kinetic energy for the box? AKE How fast is the box moving just before it hits the rear door? Vfinal = J J X J J ms

An object is suspended by two cables attached at a single point. The force applied on one cable has a magnitude of 110 pounds and acts at an angle of 50°. The force on the other cable is 60 pounds at an angle of 160°. Part A: Write each vector in component form. Show all necessary work. Part B: Find the dot product of the vectors. Show all necessary calculations. Part C: Use the dot product to find the angle between the cables. Round the answer to the nearest degree. Show all necessary calculations.

Q30

The spring-flex exercise system consists of a spring with one end fixed and a handle on the other end. The idea is that you exercise your muscles by stretching the spring from its natural length, which is 38 cm. If a 170 Newton force is required to keep the spring stretched to a length of 52 cm, how much work is required to stretch it from 51 cm to 70 cm? Your answer must include the correct units. Work =

Bob is pulling a box of his toys of mass 15.0 kg along a rough horizontal surface for a distance of 6.00 m. The tension force in the rope is 58.0 N and the angle is 30° with respect to the horizontal. The frictional force on the box is 12.0 N.  How much work is done on the box by the normal force, in Joule? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.

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