12. The diagram shows the forces acting on a lorry as it travels along a flat road. 5000 N
1200 N
1300 N
IT
5000 N
a
Two of the forces have effects that cancel each other out. Which two? Explain your answer.
b What is the resultant force acting on the lorry? Give its magnitude and direction.
What effect will this resultant force have on the speed at which the lorry is travelling?
12]
[3]

You can find results and justify them? you can test your hypothesis

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction