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The diagram shows the forces acting on a truck as it travels along a flat road:


A truck with a 500 N force pointing up, 500 N force pointing down and 100 N pointing at the back of the truck, and 60 N pointing at the front of the truck.

(a) Are the forces acting on the truck balanced? Which forces cancel out? Explain your answer.

(b) What is the resultant force acting on the truck? Define its magnitude and direction.

(c) What is the effect of the resultant force on the speed of the truck?

The diagram shows the forces acting on a truck as it travels along a flat road A truck with a 500 N force pointing up 500 N force pointing down and 100 N pointi class=

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(a) The forces acting on the truck is not balanced.

(b) The resultant force acting on the truck is 40 N towards the right direction.

(c) As the resultant force increases, the speed of the truck increases.


Resultant force of the truck

net vertical force = 500 N - 500 N = 0

net horizontal force = 100 N - 60 N = 40 N

The forces acting on the truck is not balanced.

The resultant force acting on the truck is 40 N towards the right direction.

Thus, as the resultant force increases, the speed of the truck increases.

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