A car with an initial speed of accelerates at for . How far does it travel (in m)?
Answer and explanation
Correct answer: B. 54
- Step 1: Displacement under constant acceleration is determined by the kinematic equation .
- Step 2: Substitute initial velocity , acceleration , and time : .
- Step 3: Computing the terms gives .
Answer
54.
Why not the others: 18 computes only ; 90 computes (forgets factor of ); 60 adds rather than subtracts the constant term in the final step.
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