The first step is to convert the speed from km/h to m/s, since the unit of work is joules and the unit of distance is meters.
75 km/h = 20.83 m/s
The next step is to calculate the distance traveled by the trailer in 20 minutes.
20 minutes = 20 x 60 seconds = 1200 seconds
Distance = speed x time = 20.83 m/s x 1200 s = 25,000 meters
Now we can calculate the work done by the tension force.
Work = force x distance x cos(theta)
The angle between the direction of force and the direction of motion is not given, so we will assume it is 0 degrees (cos(0) = 1).
Work = 800 N x 25,000 m x 1
Work = 20,000,000 joules
Therefore, the work done by the tension force in 20 minutes is 20,000,000 joules.
A truck pulls a trailer at 75 km/h and exerts a uniform tension force of 800N on the trailer how to calculate the work done in 20 minutes
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