How to calculate the resistant work?

How to calculate the resistant work?

If α > 90° then cos (90) < 0 and the value of work is negative: it is a tough work. If α = 0 then cos(0) = 1 and then WAB = F x AB. If α = 180° then cos (180) = -1 and then WAB = – F x AB.

How to calculate the work of a variable force?

To get the work total of strength on the total displacement, it is enough to add the elementary works when one passes from the point to the point. The summation is continuous, which leads to: The work of a force on a displacement corresponds to the circulation of the vector strength on this journey.

What is resistant labor?

One tough work corresponds to a force which is not in the direction of displacement.

How do you know if a work is resistant or driving?

It is said that the work is driving. b. Whether α>90° then cos α

What is the work of a frictional force?

The friction forces are proportional to the speed so their vector is collinear with the velocity vector. They always oppose the movement therefore their vector is in the opposite direction to the velocity vector. They don’t are not conservative so the work of the friction forces depends on the path followed.

How to calculate the work in KJ?

So for example, if I generate an average of 140 W during an exercise session of 60 minutes (= 3600 seconds), I will have done a work cumulative of 140 J/seconds x 3600 seconds = 504,000 joules dividing by 10 KJoules.

How to calculate the work of a non-conservative force?

The work of the non-conservative forces WAB(Fnc ) between two points A and B calculated from the variation of the mechanical energy \Delta_{AB} E_m\left(t\right) between these two points. A mobile of mass m=2 kg starts without initial speed (v_A=0 ms-1) towards a point B to acquire a speed v_B=10 ms-1.

How to calculate working time?

the duration worked during the day; and the hours actually worked during the week. From the daily working time and its weekly duration, you can determine your monthly and annual working time. To do this, readjust the results according to the number of weeks worked.

How to calculate the work of an object?

The work can be calculated using the following formula: W = F × D × cos (θ), where W is the work in joules (J), F is the force expressed in newtons (N), D is the distance in meters (m) and θ to the angle between the force and the direction of the object’s trajectory.

How to calculate the work of a mobile?

The work can be calculated using the following formula: W = F × D × cos (θ), where W is the work in joules (J), F is the force expressed in newtons (N), D is the distance in meters (m) and θ to the angle between the force and the direction of the object’s trajectory. Find the direction of the force and that of the trajectory of the mobile.

How to calculate the value of work?

The Different Uses of Labor Value Reverse the formula to find distance, force or angle. Divide by the time to find the power. Find the mechanical energy of a system by applying the formula TME i + W nc = TME f.