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At the bottom of its swing the pirate boat passes over a roller that transfers some energy to the pirate boat - Edexcel - GCSE Physics - Question 3 - 2016 - Paper 1

Question 3

At the bottom of its swing the pirate boat passes over a roller that transfers some energy to the pirate boat. (a) The photograph shows the pirate boat at the top o... show full transcript

Worked Solution & Example Answer:At the bottom of its swing the pirate boat passes over a roller that transfers some energy to the pirate boat - Edexcel - GCSE Physics - Question 3 - 2016 - Paper 1

Step 1

State the main form of energy that the pirate boat has gained by the time it reaches the top of the swing.

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Answer

The main form of energy that the pirate boat has gained is gravitational potential energy. This is because as the boat rises, work is done against gravity, increasing its potential energy.

Step 2

Calculate the power supplied to the electric motor.

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Answer

To calculate the power supplied to the electric motor, we use the formula:

$P = \frac{E}{t}$

Where:

$P$ is the power (in Watts),
$E$ is the energy supplied (in Joules), and
$t$ is the time (in seconds).

Substituting the given values:

$E = 1900000 J$
$t = 2.3 s$

P \approx 82608.7 W \\ P \approx 83000 W$$ Thus, the power supplied to the electric motor is approximately **83,000 Watts**.

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