1 Some students investigate the speed of cars - Edexcel - GCSE Physics - Question 1 - 2015 - Paper 1
Question 1
1 Some students investigate the speed of cars.
They measure the time it takes each car to travel a distance of 80 m.
(a) State two measuring instruments the students... show full transcript
Worked Solution & Example Answer:1 Some students investigate the speed of cars - Edexcel - GCSE Physics - Question 1 - 2015 - Paper 1
Step 1
State two measuring instruments the students should use.
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Answer
The students can use:
Stopwatch or stopclock
Measuring tape or trundle wheel
These instruments will help in accurately measuring both time and distance.
Step 2
State the colour of the slowest car.
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Answer
The colour of the slowest car is white.
Step 3
Calculate the speed of the black car.
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Answer
To calculate the speed of the black car, we use the formula:
v = \frac{d}{t}$$
where:
- $d$ is the distance travelled, which is 80 m
- $t$ is the time taken, which is 4.3 s
Substituting in the values gives us:
v = \frac{80}{4.3} \approx 18.60 , \text{m/s}$$
So, the speed of the black car is approximately 18.60 m/s.
