Question
A truck pulls a trailer at 75km/h and exerts a uniform pulling force of 800N on the trailer .calculate
1. The work done by the trailer in 30min.
2.the power required to pull the trailer.
1. The work done by the trailer in 30min.
2.the power required to pull the trailer.
Answers
Damon
75000 meters / 3600 seconds = 20.8 meters/second
2. power = force * speed = 20.8 * 800 Joules/second or Watts
1. work = power *time = that power * 30*60 seconds
easier to do 2 before 1 because do not have to calculate distance
2. power = force * speed = 20.8 * 800 Joules/second or Watts
1. work = power *time = that power * 30*60 seconds
easier to do 2 before 1 because do not have to calculate distance
Lebo
A block stone having a mass of 75kg is hauled along a horizontal floor for a distance of 100m in 2min. The coefficient of friction is 0.3. Calculate horizontal force required