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 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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Many quantities can be measured during the race - Edexcel - GCSE Physics - Question 1 - 2017 - Paper 1

Question 1

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... show full transcript

Worked Solution & Example Answer:Many quantities can be measured during the 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 vector quantity among the options provided is:

A velocity (X)

This is because velocity has both magnitude and direction, while mass, kinetic energy, and distance are scalar quantities.

Step 2

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

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Answer

To calculate 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), and
$a$ is the acceleration (2.4 m/s²).

Substituting the known values into the equation gives:

$F = 70.0 ext{ kg} imes 2.4 ext{ m/s}^2$

Now performing the multiplication:

$F = 168.0 ext{ N}$

Thus, the size of the resultant force is 168.0 N.

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