Understanding the Concepts
* Force: The push the man exerts on the van (300 N).
* Distance: The distance the van moves (10 m).
* Time: The duration of the push (5 seconds).
* Work: The energy transferred by the force over the distance.
* Power: The rate at which work is done (work per unit time).
Calculations
1. Work:
* Work = Force x Distance
* Work = 300 N * 10 m = 3000 Joules (J)
2. Power:
* Power = Work / Time
* Power = 3000 J / 5 s = 600 Watts (W)
Answers:
* Work done by the man: 3000 Joules
* Power output of the man: 600 Watts
Important Note: This calculation assumes that the man is pushing the van at a constant speed. If the van is accelerating, the work done would be greater because some of the energy would be used to increase the van's kinetic energy.
