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.
(i) 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 ... 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.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
P corresponds to 'the car is standing still'.
Q corresponds to 'the car is accelerating'.
R corresponds to 'the car is decelerating'.
S corresponds to 'the car is travelling at constant speed'.
Step 2
State the letters of the two parts of the graph where the horizontal forces acting on the car are balanced.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The parts are Q and S.
Step 3
Calculate the distance travelled by the car in part Q.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To find the distance travelled in part Q, we use the formula:
distance travelled = average speed × time.
The average speed during part Q is 30 m/s and the time is 100 s:
distance travelled = 30 m/s × 100 s = 3000 m.
Step 4
Calculate the force used to accelerate the car.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
