Complete the sentences - AQA - GCSE Physics - Question 7 - 2021 - Paper 1

As the diver falls, her speed increases, resulting in an increase in kinetic energy.

The equation that links kinetic energy, mass, and speed is given by:

$E_k = 0.5 imes m imes v^2$

We will use the kinetic energy equation:

$5040 = 0.5 imes m imes (12)^2$

Simplifying this gives:

$5040 = 0.5 imes m imes 144$

Dividing both sides by 72 (which is 0.5 times 144):

$m = \frac{5040}{72} = 70$

Thus, the mass of the diver is 70 kg.

The correct choice is:

• The thermal energy increases.

As kinetic energy is transferred to the water, it leads to an increase in the water's thermal energy.