Now both trucks are filled with water and travel, initially from rest, along a straight track.
The driving force on each truck remains constant.
The total resistive forces acting on each truck increases with both speed and mass of the truck. A large proportion of the mass of each truck is due to the water they are carrying.
Both trucks have the same initial mass. However, at the instant they begin to move, a large leak develops in one of the trucks and all the water leaks out during the journey. The shape of the speed-time graph for the truck without a leak is similar to the one drawn in part (a).
Discuss how the speed–time graph for the truck with the leak will be different from the graph of the truck without a leak.
Your answer should include an explanation of:
- The shape of the graph
- The effect of water loss on the initial gradient of the graph
- The effect of water loss on the final speed of the truck
You may draw on the figure below to help you with your answer.
The quality of your written communication will be assessed in your answer.