Using v = u + at, a car starts from rest (u = 0) and accelerates at 2 m/s^2 for 5 s. What is v?

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Prepare for the Year 10 Force and Motion Test. Utilize flashcards and multiple-choice questions with clear hints and explanations to ensure success. Equip yourself for excellence on your exam!

Multiple Choice

Using v = u + at, a car starts from rest (u = 0) and accelerates at 2 m/s^2 for 5 s. What is v?

Explanation:
Constant acceleration makes velocity change by the same amount every second, which is described by v = u + at. With the car starting from rest (u = 0), acceleration a = 2 m/s^2 and time t = 5 s, the final velocity is v = 0 + (2)(5) = 10 m/s. So the car reaches 10 m/s after 5 seconds, gaining 2 m/s each second. The other values would require longer or shorter times (for example, 15 m/s would need 7.5 seconds).

Constant acceleration makes velocity change by the same amount every second, which is described by v = u + at. With the car starting from rest (u = 0), acceleration a = 2 m/s^2 and time t = 5 s, the final velocity is v = 0 + (2)(5) = 10 m/s. So the car reaches 10 m/s after 5 seconds, gaining 2 m/s each second. The other values would require longer or shorter times (for example, 15 m/s would need 7.5 seconds).

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