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The diagram shows the forces acting on a car which is travelling along a flat straight road - Edexcel - GCSE Physics - Question 1 - 2013 - Paper 1

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The diagram shows the forces acting on a car which is travelling along a flat straight road. - driving force = 800 N to the left - drag force = 450 N to the right ... show full transcript

Worked Solution & Example Answer:The diagram shows the forces acting on a car which is travelling along a flat straight road - Edexcel - GCSE Physics - Question 1 - 2013 - Paper 1

Step 1

The size of the resultant force on the car is 350 N. In which direction is the resultant force acting?

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Answer

To find the resultant force acting on the car, we can calculate the difference between the driving force and the drag force:

extResultantForce=extDrivingForceextDragForce=800extN(left)450extN(right)=350extN(totheleft) ext{Resultant Force} = ext{Driving Force} - ext{Drag Force} = 800 ext{ N (left)} - 450 ext{ N (right)} = 350 ext{ N (to the left)}

Thus, the correct answer is B to the left.

Step 2

Complete the sentence by putting a cross (X) in the box next to your answer. The car is

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Answer

Since the resultant force is acting to the left, this indicates that the car is experiencing a net unbalanced force. Therefore, the car cannot be moving at a constant speed, nor can it be not moving. Given the options, the correct answer is that the car is A accelerating.

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