The diagram shows a cyclist during a race. (i) Many quantities can be measured during the race. Which of these quantities is a vector quantity? Put a cross (X) in the box next to your answer. A velocity B mass C kinetic energy D distance (ii) The total mass of the cyclist and the bicycle is 70.0 kg. The cyclist is accelerating at 2.4 m/s². Calculate the size of the resultant force that produces this acceleration.

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The diagram shows a cyclist during a race - Edexcel - GCSE Physics - Question 1 - 2017 - Paper 1

Question 1

The diagram shows a cyclist during a race. (i) Many quantities can be measured during the race. Which of these quantities is a vector quantity? Put a cross (X) in t... show full transcript

Worked Solution & Example Answer:The diagram shows a cyclist during a race - Edexcel - GCSE Physics - Question 1 - 2017 - Paper 1

Step 1

Which of these quantities is a vector quantity?

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Answer

The correct answer is A velocity.

Explanation:

Vector quantities have both magnitude and direction, while the others do not.

Step 2

Calculate the size of the resultant force that produces this acceleration.

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Answer

To find the resultant force, we can use Newton's second law of motion, which states:

$F = m imes a$

Where:

$F$ is the resultant force,
$m$ is the mass (70.0 kg),
$a$ is the acceleration (2.4 m/s²).

Substituting the values in:

$F = 70.0 \, \text{kg} \times 2.4 \, \text{m/s}^2$

Calculating this gives:

$F = 168.0 \, \text{N}$

Therefore, the size of the resultant force is 168 N.

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