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The photograph shows a pirate boat in a theme park - Edexcel - GCSE Physics - Question 3 - 2016 - Paper 1
Question 3
The photograph shows a pirate boat in a theme park. At the bottom of its swing the pirate boat passes over a roller that transfers some energy to the pirate boat. ... show full transcript
Worked Solution & Example Answer:The photograph shows a pirate boat in a theme park - 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.
Answer
The main form of energy that the pirate boat has gained by the time it reaches the top of the swing is gravitational potential energy. This energy is associated with its height above the ground.
Step 2
Calculate the power supplied to the electric motor.
Answer
To calculate the power supplied to the electric motor, we can use the formula for power:
ext{Power} = rac{ ext{Energy}}{ ext{Time}}Here, the energy supplied is 190000 J and the time is 2.3 s, so substituting in the values:
ext{Power} = rac{190000 ext{ J}}{2.3 ext{ s}} \\ ext{Power} eq 82391.3 ext{ W}Rounding this gives us approximately 83000 W.