Work problem Definition and 158 Threads

Work Problem Need Help Fast A box of mass m is sliding along a horizontal surface. The box leaves position x = 0 with speed v_0. The box is slowed by a constant frictional force until it comes to rest at position x = x_1. Find F_f, the magnitude of the average frictional force that acts...

A 19.1 kg block is dragged over a rough, hor- izontal surface by a constant force of 195 N acting at an angle of angle 29.1 degrees above the horizontal. The block is displaced 30.3 m, and the coeficient of kinetic friction is 0.116. The acceleration of gravity is 9.8 m/s^2 . the...

A 42.0 kg wheel, essentially a thin hoop with radius 0.90 m, is rotating at 250 rpm. It must be brought to a stop in 10 s. How much work must be done to stop it. I used the equation delta K = 1/2 I w^2_f - 1/2 I w^2_i = W and got - 11676 J, but this is not right. Help?

A force F = (11.5i + 9.62j + 13.2k)kN acts on a small object of mass 109g. If the displacement of the object is d = (5.63i + 3.81j) m, calculate the work done by the force. I know W=F*d*cos theta so W=101.4 cos theta How do I find theta? Do I use the inverse tangant of the F and the d?

here is the problem: A 2.03 mol sample of helium gas initially at 295 K and 0.350 atm is compressed isothermally to 1.00 atm. Assume that the helium behaves as an ideal gas. what is the work done on the gas. well i know that w=-p*change in volume i can figure out the final...

I am working on a problem involving a semicircular tank underground, and how much work is required to pump water out of the top. i set everything as i see correctly, but cannot computer the definite integral. i only know basic substitution and to some degree integration by parts, but that is...

Hello! I need a little help here. I have been trying to figure out this problem, but I just can't and I don't know where I am going wrong. A 116 -kg crate is being pulled across a horizontal floor by a force P that makes an angle of 35.2 ° above the horizontal. The coefficient of kinetic...

Hi, i haven't been at school this week so i only got the homework and no help. I know this is an easy question so just tell me which way of doing it is right. A person carries a carton of milk that is a weight of 10 N for a distance of 3.5m along a level surface. How much work is being...