Figure 1 shows a speed/time graph for a car - Edexcel - GCSE Physics Combined Science - Question 1 - 2019 - Paper 1
Question 1
Figure 1 shows a speed/time graph for a car.
The graph in Figure 1 is divided into four parts, P, Q, R and S.
Draw a line from the letter for each part to the corr... show full transcript
Worked Solution & Example Answer:Figure 1 shows a speed/time graph for a car - Edexcel - GCSE Physics Combined Science - Question 1 - 2019 - Paper 1
Step 1
Draw a line from the letter for each part to the correct description of the motion during that part.
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Answer
For part P, the car is standing still. For part Q, the car is accelerating. For part R, the car is decelerating. For part S, the car is travelling at constant speed.
Step 2
In two parts of the graph in Figure 1 the forces are balanced.
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Answer
The forces are balanced in part Q and part S.
Step 3
Calculate the distance travelled by the car in part Q.
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Answer
To calculate the distance travelled during part Q, we use the equation:
distance travelled = average speed × time.
From the graph, the average speed in part Q is 30 m/s and the time is 100 seconds.
Thus, distance travelled = 30 m/s × 100 s = 3000 m.
Step 4
Calculate the force used to accelerate the car.
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