Final answer:
The energy used by the car is 2500 joules (J).
Step-by-step explanation:
The energy used by the car can be calculated using the formula:
Energy = Power x Time
Given that the car uses 100 watts of power and takes 25 seconds to use this much power, we can substitute these values into the formula:
Energy = 100 watts x 25 seconds
Simplifying the calculation gives us:
Energy = 2500 joules (J)
Therefore, the energy used by the car is 2500 joules (J).